如何使用 GridData 更新 TextBoxes 数据？
How to update TextBoxes Data using GridData?
关于下面的 MainWindow 屏幕，我想用 DataGrid 插入、更新和删除数据。我已经为数据创建了插入和删除选项，但是当我 运行 出现错误时，update 选项出现问题。
以及 GridData 中的 SubID（主键），我希望它在我插入新值或删除值时自动计算行数（1,2,3，...），因为如下所示主窗口显示当我插入一个新值时，row=35 不按顺序排列。
注意：我已将组合框（分包商）与数据库链接在一起，每次选择时都会在文本框中显示数据。
The MainWindow Display
The MainWindow.cs.xaml
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.IO;
using Microsoft.Win32;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Diagnostics;
using System.Data;
using System.Configuration;
using System.Collections;
namespace BV_Desktop
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
public MainWindow()
{
InitializeComponent();
fillcombobox();
DisplayData();
}
private void Window_Loaded(object sender, EventArgs e)
{
}
public void fillcombobox()
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
string sql = "Select * from Tb_Sub";
SqlCommand cmd = new SqlCommand(sql, conn);
SqlDataReader myreader;
try
{
conn.Open();
myreader = cmd.ExecuteReader();
while (myreader.Read())
{
string sname = myreader.GetString(1);
comboBox1.Items.Add(sname);
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show(ex.Message);
}
}
private void comboBox1_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
string sql = "Select * from Tb_Sub where (Subcontractor)='" + comboBox1.SelectedItem+ "';";
SqlCommand cmd = new SqlCommand(sql, conn);
SqlDataReader myreader;
try
{
txtClients.Text = string.Empty;
txtDetails.Text = string.Empty;
txtPO.Text = string.Empty;
txtScope.Text = string.Empty;
txtProjectNo.Text = string.Empty;
txtZIG.Text = string.Empty;
txtAmount.Text = string.Empty;
txtInvoiceDate.Text = string.Empty;
txtStatus.Text = string.Empty;
conn.Open();
myreader = cmd.ExecuteReader();
while (myreader.Read())
{
string clients = myreader.IsDBNull(2) ? null : myreader.GetString(2);
string contactdetails = myreader.IsDBNull(3) ? null : myreader.GetString(3);
string ponum = myreader.IsDBNull(4) ? null : myreader.GetString(4);
string scope = myreader.IsDBNull(5) ? null : myreader.GetString(5);
string projectno = myreader.IsDBNull(6) ? null : myreader.GetString(6);
string zigno = myreader.IsDBNull(7) ? null : myreader.GetInt32(7).ToString();
string amount = myreader.IsDBNull(8) ? null : myreader.GetSqlMoney(8).ToString();
string invoicedate = myreader.IsDBNull(9) ? null : myreader.GetDateTime(9).ToShortDateString();
string status = myreader.IsDBNull(10) ? null : myreader.GetString(10).ToString();
txtClients.Text = clients;
txtDetails.Text = contactdetails;
txtPO.Text = ponum;
txtScope.Text = scope;
txtProjectNo.Text = projectno;
txtZIG.Text = zigno;
txtAmount.Text = amount;
txtInvoiceDate.Text = invoicedate;
txtStatus.Text = status;
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show(ex.Message);
}
}
private void btnOpenFiles_Click(object sender, RoutedEventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Multiselect = true;
openFileDialog.InitialDirectory = @"c:\";
if (openFileDialog.ShowDialog() == DialogResult)
{
string filename = openFileDialog.FileName;
//txtbox.Text = filename;
}
}
private void btn_Insert_Click(object sender, RoutedEventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into [Tb_Sub] (Subcontractor,Clients,ContactDetails,[P.O.Num],Scope,[Project No.],[ZIG No.],[Amount(AED)],InvoiceDate,Status) values('"+comboBox1.Text+"','"+txtClients.Text+"','"+txtDetails.Text+ "','" + txtPO.Text + "'," +
"'" + txtScope.Text + "','" + txtProjectNo.Text + "','" + txtZIG.Text + "','" + txtAmount.Text + "','" + txtInvoiceDate.Text + "','" + txtStatus.Text + "')";
cmd.ExecuteNonQuery();
conn.Close();
comboBox1.Text = "";
txtClients.Text = "";
txtDetails.Text = "";
txtPO.Text = "";
txtScope.Text = "";
txtProjectNo.Text = "";
txtZIG.Text = "";
txtAmount.Text = "";
txtInvoiceDate.Text = "";
txtStatus.Text = "";
DisplayData();
MessageBox.Show("Record is Inserted");
}
private void DisplayData()
{
string ConString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
string CmdString = string.Empty;
using (SqlConnection conn = new SqlConnection(ConString))
{
CmdString = "SELECT Subcontractor,Clients,ContactDetails,[P.O.Num],Scope,[Project No.],[ZIG No.],[Amount(AED)],InvoiceDate,Status FROM Tb_Sub";
SqlCommand cmd = new SqlCommand(CmdString, conn);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataTable dt = new DataTable("Tb_Sub");
sda.Fill(dt);
dataGridView1.ItemsSource = dt.DefaultView;
}
}
/*private void btn_update_Click(object sender, RoutedEventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = $"update [Tb_Sub] set Clients = '{txtClients.Text}', ContactDetails = '{txtDetails.Text}', [P.O.Num] = '{txtPO.Text}', Scope = '{txtScope.Text}',[project No.] = '{txtProjectNo.Text}',[ZIG No.] = '{txtZIG.Text}',[Amount(AED)] = '{ txtAmount.Text}',InvoiceDate = '{ txtInvoiceDate.Text }',Status = '{txtStatus.Text}' where Subcontractor = ' {comboBox1.Text }'";
cmd.ExecuteNonQuery();
conn.Close();
comboBox1.Text = "";
txtClients.Text = "";
txtDetails.Text = "";
txtPO.Text = "";
txtScope.Text = "";
txtProjectNo.Text = "";
txtZIG.Text = "";
txtAmount.Text = "";
txtInvoiceDate.Text = "";
txtStatus.Text = "";
DisplayData();
MessageBox.Show("Record is Updated.");
}*/
private void btn_update_Click(object sender, RoutedEventArgs e)
{
if (comboBox1.Text != "" && txtClients.Text != "" && txtDetails.Text != "" && txtPO.Text != "" && txtScope.Text != "" && txtProjectNo.Text != ""
&& txtZIG.Text != "" && txtAmount.Text != "" && txtInvoiceDate.Text != "" && txtStatus.Text != "")
{
cmd = new SqlCommand("update Tb_Sub set Cliets=@clients,ContactDetails=@contactdetails,P.O.Num=@ponum,Scope=@scope," +
"Project No.=@projectno,ZIG No.=@zigno,Amount(AED)=@amount,InvoiceDate=@invoicedate,Status=@status" +
" where Subcontractor=@sub", con);
con.Open();
cmd.Parameters.AddWithValue("@sub", comboBox1.Text);
cmd.Parameters.AddWithValue("@clients", txtClients.Text);
cmd.Parameters.AddWithValue("@contactdetails", txtDetails.Text);
cmd.Parameters.AddWithValue("@ponum", txtPO.Text);
cmd.Parameters.AddWithValue("@scope", txtScope.Text);
cmd.Parameters.AddWithValue("@projectno", txtProjectNo.Text);
cmd.Parameters.AddWithValue("@zigno", txtZIG.Text);
cmd.Parameters.AddWithValue("@amount", txtAmount.Text);
cmd.Parameters.AddWithValue("@invoicedate", txtInvoiceDate.Text);
cmd.Parameters.AddWithValue("@status", txtStatus.Text);
MessageBox.Show("Record Updated Successfully");
con.Close();
}
else
{
MessageBox.Show("Please Select Record to Update");
}
}
private void btn_delete_Click(object sender, RoutedEventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = $"delete from [Tb_Sub] where Subcontractor= '{comboBox1.Text}'";
cmd.ExecuteNonQuery();
conn.Close();
comboBox1.Text = "";
txtClients.Text = "";
txtDetails.Text = "";
txtPO.Text = "";
txtScope.Text = "";
txtProjectNo.Text = "";
txtZIG.Text = "";
txtAmount.Text = "";
txtInvoiceDate.Text = "";
txtStatus.Text = "";
DisplayData();
MessageBox.Show("Record is Deleted.");
}
private void dataGridView1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
DataGrid gd = (DataGrid)sender;
DataRowView row_selected = gd.SelectedItem as DataRowView;
if(row_selected !=null)
{
comboBox1.Text = row_selected["Subcontractor"].ToString();
txtClients.Text = row_selected["Clients"].ToString();
txtDetails.Text = row_selected["ContactDetails"].ToString();
txtPO.Text = row_selected["P.O.Num"].ToString();
txtScope.Text = row_selected["Scope"].ToString();
txtProjectNo.Text = row_selected["Project No."].ToString();
txtZIG.Text = row_selected["ZIG No."].ToString();
txtAmount.Text = row_selected["Amount(AED)"].ToString();
txtInvoiceDate.Text = row_selected["InvoiceDate"].ToString();
txtStatus.Text = row_selected["Status"].ToString();
}
}
private void dataGridView1_KeyDown(object sender, KeyEventArgs e)
{
}
private void txtProjectCount_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
}
}
The mainwindow.xaml
<Window x:Class="BV_Desktop.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:BV_Desktop"
mc:Ignorable="d" FontFamily="Times New Roman"
Loaded="Window_Loaded"
Title="BVSubcontractor" Height="740.392" Width="743.887" Icon="/images/bureauveritas_logo.png">
<Border Padding="10">
<StackPanel>
<TextBlock Text="SubcontractorName:" FontWeight="Bold"/>
<ComboBox x:Name="comboBox1" Padding="2" Margin="0,0,269,0" SelectionChanged="comboBox1_SelectionChanged_1" IsEditable="True" BorderThickness="1" >
<ComboBox.Effect>
<DropShadowEffect Color="Gray" BlurRadius="3" ShadowDepth="2"/>
</ComboBox.Effect>
</ComboBox>
<TextBlock Text="ProjectNum:" FontWeight="Bold"/>
<ComboBox x:Name="txtProjectCount" Padding="2" Margin="0,0,269,0" IsEditable="True" BorderThickness="1" SelectionChanged="txtProjectCount_SelectionChanged" >
<ComboBox.Effect>
<DropShadowEffect Color="Gray" BlurRadius="3" ShadowDepth="2"/>
</ComboBox.Effect>
</ComboBox>
<TextBlock Text="Clients:" FontWeight="Bold" />
<TextBox x:Name="txtClients" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="ContactDetails:" FontWeight="Bold" />
<TextBox x:Name="txtDetails" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="P.O.No.:" FontWeight="Bold" />
<TextBox x:Name="txtPO" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="Scope:" FontWeight="Bold" />
<TextBox x:Name="txtScope" Padding="2" Margin="0,0,269,0" />
<TextBlock FontWeight="Bold" Text="ProjectNo.:"/>
<TextBox x:Name="txtProjectNo" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="ZIG No.:" FontWeight="Bold" />
<TextBox x:Name="txtZIG" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="Amount (AED):" FontWeight="Bold" />
<TextBox x:Name="txtAmount" Padding="2" Margin="0,0,269,0" />
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="213*" />
<ColumnDefinition Width="5*" />
<ColumnDefinition Width="95*"/>
</Grid.ColumnDefinitions>
<!-- invoicedate -->
<StackPanel Grid.Column="0" Margin="0 0 10 0">
<TextBlock Text="InvoiceDate:" FontWeight="Bold" />
<TextBox x:Name="txtInvoiceDate" Padding="2" Margin="0,0,36,0" Height="20" />
</StackPanel>
<!-- invoiceNo. -->
<Button x:Name="btnOpenFile" Click="btnOpenFiles_Click" Content="Open file" Margin="429,14,178,0" RenderTransformOrigin="0.133,0.651" Height="20" VerticalAlignment="Top" Grid.ColumnSpan="3"/>
<TextBlock Text="InvoiceNo:" FontWeight="Bold" Margin="430,0,162,25" Grid.ColumnSpan="3" />
<Button x:Name="btnOpenFile_Copy" Click="btnOpenFiles_Click" Content="Save" Margin="60,14,48,0" RenderTransformOrigin="0.133,0.651" Height="20" VerticalAlignment="Top" Grid.Column="2"/>
</Grid>
<TextBlock Text="Status:" FontWeight="Bold" />
<TextBox x:Name="txtStatus" Padding="2" Margin="0,0,269,0" />
<Grid Height="58" RenderTransformOrigin="0.499,0.097">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="415*"/>
<ColumnDefinition Width="208*"/>
<ColumnDefinition Width="68*"/>
</Grid.ColumnDefinitions>
<!--Insert Button-->
<Button x:Name="btn_Insert" Content="New" Height="25" Margin="10,15,284,18" RenderTransformOrigin="-1.385,1.406" Click="btn_Insert_Click" >
<Button.Resources>
<Style TargetType="{x:Type Border}">
<Setter Property="CornerRadius" Value="5"/>
</Style>
</Button.Resources>
</Button>
<!--Update Button-->
<Button x:Name="btn_update" Content="Update" Height="25" Margin="155,13,139,20" RenderTransformOrigin="-1.385,1.406" Click="btn_update_Click">
<Button.Resources>
<Style TargetType="{x:Type Border}">
<Setter Property="CornerRadius" Value="5"/>
</Style>
</Button.Resources>
</Button>
<!--Reset Button-->
<Button x:Name="btn_delete" Content="Delete" Height="25" Margin="300,12,210,21" RenderTransformOrigin="-1.385,1.406" Click="btn_delete_Click" Grid.ColumnSpan="2">
<Button.Resources>
<Style TargetType="{x:Type Border}">
<Setter Property="CornerRadius" Value="5"/>
</Style>
</Button.Resources>
</Button>
</Grid>
<DataGrid x:Name="dataGridView1" Background="LightGray" HorizontalScrollBarVisibility="Visible"
RowBackground="LightYellow" AlternatingRowBackground="LightBlue"
xmlns:local="clr-namespace:BV_Desktop" Height="157" SelectionChanged="dataGridView1_SelectionChanged" RenderTransformOrigin="0.489,1.873" >
<DataGrid.Columns>
</DataGrid.Columns>
</DataGrid>
<!--DataGrid-->
</StackPanel>
</Border>
The error i got when for example, edit the ContactDetails
以下示例以非常基本的方式展示了如何实现更新逻辑。您必须扩展数据模型以满足您的要求（添加缺失的列等）。
关键是将DataTable绑定到DataGrid。然后将 DataGrid.SelectedItem 属性 绑定到依赖项 属性，例如 SelectedRow，它用作编辑表单字段的绑定源。所选项目是DataRowView。您可以通过绑定到 SelectedRow[ColumnName] 将每个 TextBox 直接绑定到相应的列。这将自动更新 DataGrid 和基础 DataTable.
使用SqlDataAdapter.Update()使用修改后的DataTable更新数据库。
为简单起见，示例基于由两列组成的table：SubID（主键）和Subcontractor。 SubID 应该是 read-only 并且由 DBMS 自动生成。它不会显示在 DataGrid 中，仅用于标识目标行，例如UPDATE 或 DELETE SQL 操作。
MainWindow.xaml
<Window>
<StackPanel>
<!--
Edit the Subcontractor column of the selected row from the below DataGrid.
Editing the TextBox will automatically update the DataGrid due to the SelectedItem binding.
-->
<TextBox Text="{Binding SelectedSubcontractorTableRow[Subcontractor]}" />
<Button Content="Update Database"
Click="UpdateDatabaseOnClicked" />
<DataGrid ItemsSource="{Binding SubcontractorTable}"
SelectedItem="{Binding SelectedSubcontractorTableRow}"
AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Header="Subcontractor" Binding="{Binding Subcontractor}" />
</DataGrid.Columns>
</DataGrid>
</StackPanel>
</Window>
MainWindow.xaml.cs
partial class MainWindow : Window
{
public static readonly DependencyProperty SubcontractorTableProperty = DependencyProperty.Register(
"SubcontractorTable",
typeof(DataTable),
typeof(MainWindow),
new PropertyMetadata(default(DataTable)));
public DataTable SubcontractorTable
{
get => (DataTable) GetValue(MainWindow.SubcontractorTableProperty);
set => SetValue(MainWindow.SubcontractorTableProperty, value);
}
public static readonly DependencyProperty SelectedSubcontractorTableRowProperty = DependencyProperty.Register(
"SelectedSubcontractorTableRow",
typeof(DataRowView),
typeof(MainWindow),
new PropertyMetadata(default(DataRowView)));
public DataRowView SelectedSubcontractorTableRow
{
get => (DataRowView) GetValue(MainWindow.SelectedSubcontractorTableRowProperty);
set => SetValue(MainWindow.SelectedSubcontractorTableRowProperty, value);
}
public MainWindow()
{
InitializeComponent();
this.DataContext = this;
DisplayData();
}
private void DisplayData()
{
string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
using (SqlConnection sqlConnection = new SqlConnection(connectionString))
{
string cmdString = "SELECT * FROM Tb_Sub";
using (var selectCommand = new SqlCommand(cmdString, sqlConnection))
{
using (var dataAdapter = new SqlDataAdapter(selectCommand))
{
this.SubcontractorTable = new DataTable("Tb_Sub");
dataAdapter.Fill(this.SubcontractorTable);
}
}
}
}
// Update database using a DataTable
private async void UpdateDatabaseOnClicked(object sender, RoutedEventArgs e)
{
string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
using (SqlConnection sqlConnection = new SqlConnection(connectionString))
{
using (SqlCommand updateCommand = sqlConnection.CreateCommand())
{
// The actual update query will be automatically generated
// by the SqlDataAdapter based on the SELECT command
updateCommand.CommandText = "SELECT * FROM Tb_Sub";
using (var dataAdapter = new SqlDataAdapter(updateCommand))
{
SqlCommandBuilder builder = new SqlCommandBuilder(dataAdapter);
// Generate UPDATE query
builder.GetUpdateCommand();
int updatedRowCount = dataAdapter.Update(this.SubcontractorTable);
if (updatedRowCount > 0)
{
MessageBox.Show("Record is Updated");
}
}
}
}
}
}
关于下面的 MainWindow 屏幕，我想用 DataGrid 插入、更新和删除数据。我已经为数据创建了插入和删除选项，但是当我 运行 出现错误时，update 选项出现问题。 以及 GridData 中的 SubID（主键），我希望它在我插入新值或删除值时自动计算行数（1,2,3，...），因为如下所示主窗口显示当我插入一个新值时，row=35 不按顺序排列。 注意：我已将组合框（分包商）与数据库链接在一起，每次选择时都会在文本框中显示数据。
The MainWindow Display
The MainWindow.cs.xaml
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.IO;
using Microsoft.Win32;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Diagnostics;
using System.Data;
using System.Configuration;
using System.Collections;
namespace BV_Desktop
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
public MainWindow()
{
InitializeComponent();
fillcombobox();
DisplayData();
}
private void Window_Loaded(object sender, EventArgs e)
{
}
public void fillcombobox()
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
string sql = "Select * from Tb_Sub";
SqlCommand cmd = new SqlCommand(sql, conn);
SqlDataReader myreader;
try
{
conn.Open();
myreader = cmd.ExecuteReader();
while (myreader.Read())
{
string sname = myreader.GetString(1);
comboBox1.Items.Add(sname);
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show(ex.Message);
}
}
private void comboBox1_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
string sql = "Select * from Tb_Sub where (Subcontractor)='" + comboBox1.SelectedItem+ "';";
SqlCommand cmd = new SqlCommand(sql, conn);
SqlDataReader myreader;
try
{
txtClients.Text = string.Empty;
txtDetails.Text = string.Empty;
txtPO.Text = string.Empty;
txtScope.Text = string.Empty;
txtProjectNo.Text = string.Empty;
txtZIG.Text = string.Empty;
txtAmount.Text = string.Empty;
txtInvoiceDate.Text = string.Empty;
txtStatus.Text = string.Empty;
conn.Open();
myreader = cmd.ExecuteReader();
while (myreader.Read())
{
string clients = myreader.IsDBNull(2) ? null : myreader.GetString(2);
string contactdetails = myreader.IsDBNull(3) ? null : myreader.GetString(3);
string ponum = myreader.IsDBNull(4) ? null : myreader.GetString(4);
string scope = myreader.IsDBNull(5) ? null : myreader.GetString(5);
string projectno = myreader.IsDBNull(6) ? null : myreader.GetString(6);
string zigno = myreader.IsDBNull(7) ? null : myreader.GetInt32(7).ToString();
string amount = myreader.IsDBNull(8) ? null : myreader.GetSqlMoney(8).ToString();
string invoicedate = myreader.IsDBNull(9) ? null : myreader.GetDateTime(9).ToShortDateString();
string status = myreader.IsDBNull(10) ? null : myreader.GetString(10).ToString();
txtClients.Text = clients;
txtDetails.Text = contactdetails;
txtPO.Text = ponum;
txtScope.Text = scope;
txtProjectNo.Text = projectno;
txtZIG.Text = zigno;
txtAmount.Text = amount;
txtInvoiceDate.Text = invoicedate;
txtStatus.Text = status;
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show(ex.Message);
}
}
private void btnOpenFiles_Click(object sender, RoutedEventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Multiselect = true;
openFileDialog.InitialDirectory = @"c:\";
if (openFileDialog.ShowDialog() == DialogResult)
{
string filename = openFileDialog.FileName;
//txtbox.Text = filename;
}
}
private void btn_Insert_Click(object sender, RoutedEventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source=DESKTOP-7J69E9N;Initial Catalog=DatabaseInfor;Integrated Security=True");
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into [Tb_Sub] (Subcontractor,Clients,ContactDetails,[P.O.Num],Scope,[Project No.],[ZIG No.],[Amount(AED)],InvoiceDate,Status) values('"+comboBox1.Text+"','"+txtClients.Text+"','"+txtDetails.Text+ "','" + txtPO.Text + "'," +
"'" + txtScope.Text + "','" + txtProjectNo.Text + "','" + txtZIG.Text + "','" + txtAmount.Text + "','" + txtInvoiceDate.Text + "','" + txtStatus.Text + "')";
cmd.ExecuteNonQuery();
conn.Close();
comboBox1.Text = "";
txtClients.Text = "";
txtDetails.Text = "";
txtPO.Text = "";
txtScope.Text = "";
txtProjectNo.Text = "";
txtZIG.Text = "";
txtAmount.Text = "";
txtInvoiceDate.Text = "";
txtStatus.Text = "";
DisplayData();
MessageBox.Show("Record is Inserted");
}
private void DisplayData()
{
string ConString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
string CmdString = string.Empty;
using (SqlConnection conn = new SqlConnection(ConString))
{
CmdString = "SELECT Subcontractor,Clients,ContactDetails,[P.O.Num],Scope,[Project No.],[ZIG No.],[Amount(AED)],InvoiceDate,Status FROM Tb_Sub";
SqlCommand cmd = new SqlCommand(CmdString, conn);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataTable dt = new DataTable("Tb_Sub");
sda.Fill(dt);
dataGridView1.ItemsSource = dt.DefaultView;
}
}
/*private void btn_update_Click(object sender, RoutedEventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = $"update [Tb_Sub] set Clients = '{txtClients.Text}', ContactDetails = '{txtDetails.Text}', [P.O.Num] = '{txtPO.Text}', Scope = '{txtScope.Text}',[project No.] = '{txtProjectNo.Text}',[ZIG No.] = '{txtZIG.Text}',[Amount(AED)] = '{ txtAmount.Text}',InvoiceDate = '{ txtInvoiceDate.Text }',Status = '{txtStatus.Text}' where Subcontractor = ' {comboBox1.Text }'";
cmd.ExecuteNonQuery();
conn.Close();
comboBox1.Text = "";
txtClients.Text = "";
txtDetails.Text = "";
txtPO.Text = "";
txtScope.Text = "";
txtProjectNo.Text = "";
txtZIG.Text = "";
txtAmount.Text = "";
txtInvoiceDate.Text = "";
txtStatus.Text = "";
DisplayData();
MessageBox.Show("Record is Updated.");
}*/
private void btn_update_Click(object sender, RoutedEventArgs e)
{
if (comboBox1.Text != "" && txtClients.Text != "" && txtDetails.Text != "" && txtPO.Text != "" && txtScope.Text != "" && txtProjectNo.Text != ""
&& txtZIG.Text != "" && txtAmount.Text != "" && txtInvoiceDate.Text != "" && txtStatus.Text != "")
{
cmd = new SqlCommand("update Tb_Sub set Cliets=@clients,ContactDetails=@contactdetails,P.O.Num=@ponum,Scope=@scope," +
"Project No.=@projectno,ZIG No.=@zigno,Amount(AED)=@amount,InvoiceDate=@invoicedate,Status=@status" +
" where Subcontractor=@sub", con);
con.Open();
cmd.Parameters.AddWithValue("@sub", comboBox1.Text);
cmd.Parameters.AddWithValue("@clients", txtClients.Text);
cmd.Parameters.AddWithValue("@contactdetails", txtDetails.Text);
cmd.Parameters.AddWithValue("@ponum", txtPO.Text);
cmd.Parameters.AddWithValue("@scope", txtScope.Text);
cmd.Parameters.AddWithValue("@projectno", txtProjectNo.Text);
cmd.Parameters.AddWithValue("@zigno", txtZIG.Text);
cmd.Parameters.AddWithValue("@amount", txtAmount.Text);
cmd.Parameters.AddWithValue("@invoicedate", txtInvoiceDate.Text);
cmd.Parameters.AddWithValue("@status", txtStatus.Text);
MessageBox.Show("Record Updated Successfully");
con.Close();
}
else
{
MessageBox.Show("Please Select Record to Update");
}
}
private void btn_delete_Click(object sender, RoutedEventArgs e)
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = $"delete from [Tb_Sub] where Subcontractor= '{comboBox1.Text}'";
cmd.ExecuteNonQuery();
conn.Close();
comboBox1.Text = "";
txtClients.Text = "";
txtDetails.Text = "";
txtPO.Text = "";
txtScope.Text = "";
txtProjectNo.Text = "";
txtZIG.Text = "";
txtAmount.Text = "";
txtInvoiceDate.Text = "";
txtStatus.Text = "";
DisplayData();
MessageBox.Show("Record is Deleted.");
}
private void dataGridView1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
DataGrid gd = (DataGrid)sender;
DataRowView row_selected = gd.SelectedItem as DataRowView;
if(row_selected !=null)
{
comboBox1.Text = row_selected["Subcontractor"].ToString();
txtClients.Text = row_selected["Clients"].ToString();
txtDetails.Text = row_selected["ContactDetails"].ToString();
txtPO.Text = row_selected["P.O.Num"].ToString();
txtScope.Text = row_selected["Scope"].ToString();
txtProjectNo.Text = row_selected["Project No."].ToString();
txtZIG.Text = row_selected["ZIG No."].ToString();
txtAmount.Text = row_selected["Amount(AED)"].ToString();
txtInvoiceDate.Text = row_selected["InvoiceDate"].ToString();
txtStatus.Text = row_selected["Status"].ToString();
}
}
private void dataGridView1_KeyDown(object sender, KeyEventArgs e)
{
}
private void txtProjectCount_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
}
}
The mainwindow.xaml
<Window x:Class="BV_Desktop.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:BV_Desktop"
mc:Ignorable="d" FontFamily="Times New Roman"
Loaded="Window_Loaded"
Title="BVSubcontractor" Height="740.392" Width="743.887" Icon="/images/bureauveritas_logo.png">
<Border Padding="10">
<StackPanel>
<TextBlock Text="SubcontractorName:" FontWeight="Bold"/>
<ComboBox x:Name="comboBox1" Padding="2" Margin="0,0,269,0" SelectionChanged="comboBox1_SelectionChanged_1" IsEditable="True" BorderThickness="1" >
<ComboBox.Effect>
<DropShadowEffect Color="Gray" BlurRadius="3" ShadowDepth="2"/>
</ComboBox.Effect>
</ComboBox>
<TextBlock Text="ProjectNum:" FontWeight="Bold"/>
<ComboBox x:Name="txtProjectCount" Padding="2" Margin="0,0,269,0" IsEditable="True" BorderThickness="1" SelectionChanged="txtProjectCount_SelectionChanged" >
<ComboBox.Effect>
<DropShadowEffect Color="Gray" BlurRadius="3" ShadowDepth="2"/>
</ComboBox.Effect>
</ComboBox>
<TextBlock Text="Clients:" FontWeight="Bold" />
<TextBox x:Name="txtClients" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="ContactDetails:" FontWeight="Bold" />
<TextBox x:Name="txtDetails" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="P.O.No.:" FontWeight="Bold" />
<TextBox x:Name="txtPO" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="Scope:" FontWeight="Bold" />
<TextBox x:Name="txtScope" Padding="2" Margin="0,0,269,0" />
<TextBlock FontWeight="Bold" Text="ProjectNo.:"/>
<TextBox x:Name="txtProjectNo" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="ZIG No.:" FontWeight="Bold" />
<TextBox x:Name="txtZIG" Padding="2" Margin="0,0,269,0" />
<TextBlock Text="Amount (AED):" FontWeight="Bold" />
<TextBox x:Name="txtAmount" Padding="2" Margin="0,0,269,0" />
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="213*" />
<ColumnDefinition Width="5*" />
<ColumnDefinition Width="95*"/>
</Grid.ColumnDefinitions>
<!-- invoicedate -->
<StackPanel Grid.Column="0" Margin="0 0 10 0">
<TextBlock Text="InvoiceDate:" FontWeight="Bold" />
<TextBox x:Name="txtInvoiceDate" Padding="2" Margin="0,0,36,0" Height="20" />
</StackPanel>
<!-- invoiceNo. -->
<Button x:Name="btnOpenFile" Click="btnOpenFiles_Click" Content="Open file" Margin="429,14,178,0" RenderTransformOrigin="0.133,0.651" Height="20" VerticalAlignment="Top" Grid.ColumnSpan="3"/>
<TextBlock Text="InvoiceNo:" FontWeight="Bold" Margin="430,0,162,25" Grid.ColumnSpan="3" />
<Button x:Name="btnOpenFile_Copy" Click="btnOpenFiles_Click" Content="Save" Margin="60,14,48,0" RenderTransformOrigin="0.133,0.651" Height="20" VerticalAlignment="Top" Grid.Column="2"/>
</Grid>
<TextBlock Text="Status:" FontWeight="Bold" />
<TextBox x:Name="txtStatus" Padding="2" Margin="0,0,269,0" />
<Grid Height="58" RenderTransformOrigin="0.499,0.097">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="415*"/>
<ColumnDefinition Width="208*"/>
<ColumnDefinition Width="68*"/>
</Grid.ColumnDefinitions>
<!--Insert Button-->
<Button x:Name="btn_Insert" Content="New" Height="25" Margin="10,15,284,18" RenderTransformOrigin="-1.385,1.406" Click="btn_Insert_Click" >
<Button.Resources>
<Style TargetType="{x:Type Border}">
<Setter Property="CornerRadius" Value="5"/>
</Style>
</Button.Resources>
</Button>
<!--Update Button-->
<Button x:Name="btn_update" Content="Update" Height="25" Margin="155,13,139,20" RenderTransformOrigin="-1.385,1.406" Click="btn_update_Click">
<Button.Resources>
<Style TargetType="{x:Type Border}">
<Setter Property="CornerRadius" Value="5"/>
</Style>
</Button.Resources>
</Button>
<!--Reset Button-->
<Button x:Name="btn_delete" Content="Delete" Height="25" Margin="300,12,210,21" RenderTransformOrigin="-1.385,1.406" Click="btn_delete_Click" Grid.ColumnSpan="2">
<Button.Resources>
<Style TargetType="{x:Type Border}">
<Setter Property="CornerRadius" Value="5"/>
</Style>
</Button.Resources>
</Button>
</Grid>
<DataGrid x:Name="dataGridView1" Background="LightGray" HorizontalScrollBarVisibility="Visible"
RowBackground="LightYellow" AlternatingRowBackground="LightBlue"
xmlns:local="clr-namespace:BV_Desktop" Height="157" SelectionChanged="dataGridView1_SelectionChanged" RenderTransformOrigin="0.489,1.873" >
<DataGrid.Columns>
</DataGrid.Columns>
</DataGrid>
<!--DataGrid-->
</StackPanel>
</Border>
The error i got when for example, edit the ContactDetails
以下示例以非常基本的方式展示了如何实现更新逻辑。您必须扩展数据模型以满足您的要求（添加缺失的列等）。
关键是将DataTable绑定到DataGrid。然后将 DataGrid.SelectedItem 属性 绑定到依赖项 属性，例如 SelectedRow，它用作编辑表单字段的绑定源。所选项目是DataRowView。您可以通过绑定到 SelectedRow[ColumnName] 将每个 TextBox 直接绑定到相应的列。这将自动更新 DataGrid 和基础 DataTable.
使用SqlDataAdapter.Update()使用修改后的DataTable更新数据库。
为简单起见，示例基于由两列组成的table：SubID（主键）和Subcontractor。 SubID 应该是 read-only 并且由 DBMS 自动生成。它不会显示在 DataGrid 中，仅用于标识目标行，例如UPDATE 或 DELETE SQL 操作。
MainWindow.xaml
<Window>
<StackPanel>
<!--
Edit the Subcontractor column of the selected row from the below DataGrid.
Editing the TextBox will automatically update the DataGrid due to the SelectedItem binding.
-->
<TextBox Text="{Binding SelectedSubcontractorTableRow[Subcontractor]}" />
<Button Content="Update Database"
Click="UpdateDatabaseOnClicked" />
<DataGrid ItemsSource="{Binding SubcontractorTable}"
SelectedItem="{Binding SelectedSubcontractorTableRow}"
AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Header="Subcontractor" Binding="{Binding Subcontractor}" />
</DataGrid.Columns>
</DataGrid>
</StackPanel>
</Window>
MainWindow.xaml.cs
partial class MainWindow : Window
{
public static readonly DependencyProperty SubcontractorTableProperty = DependencyProperty.Register(
"SubcontractorTable",
typeof(DataTable),
typeof(MainWindow),
new PropertyMetadata(default(DataTable)));
public DataTable SubcontractorTable
{
get => (DataTable) GetValue(MainWindow.SubcontractorTableProperty);
set => SetValue(MainWindow.SubcontractorTableProperty, value);
}
public static readonly DependencyProperty SelectedSubcontractorTableRowProperty = DependencyProperty.Register(
"SelectedSubcontractorTableRow",
typeof(DataRowView),
typeof(MainWindow),
new PropertyMetadata(default(DataRowView)));
public DataRowView SelectedSubcontractorTableRow
{
get => (DataRowView) GetValue(MainWindow.SelectedSubcontractorTableRowProperty);
set => SetValue(MainWindow.SelectedSubcontractorTableRowProperty, value);
}
public MainWindow()
{
InitializeComponent();
this.DataContext = this;
DisplayData();
}
private void DisplayData()
{
string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
using (SqlConnection sqlConnection = new SqlConnection(connectionString))
{
string cmdString = "SELECT * FROM Tb_Sub";
using (var selectCommand = new SqlCommand(cmdString, sqlConnection))
{
using (var dataAdapter = new SqlDataAdapter(selectCommand))
{
this.SubcontractorTable = new DataTable("Tb_Sub");
dataAdapter.Fill(this.SubcontractorTable);
}
}
}
}
// Update database using a DataTable
private async void UpdateDatabaseOnClicked(object sender, RoutedEventArgs e)
{
string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
using (SqlConnection sqlConnection = new SqlConnection(connectionString))
{
using (SqlCommand updateCommand = sqlConnection.CreateCommand())
{
// The actual update query will be automatically generated
// by the SqlDataAdapter based on the SELECT command
updateCommand.CommandText = "SELECT * FROM Tb_Sub";
using (var dataAdapter = new SqlDataAdapter(updateCommand))
{
SqlCommandBuilder builder = new SqlCommandBuilder(dataAdapter);
// Generate UPDATE query
builder.GetUpdateCommand();
int updatedRowCount = dataAdapter.Update(this.SubcontractorTable);
if (updatedRowCount > 0)
{
MessageBox.Show("Record is Updated");
}
}
}
}
}
}