Gridview 仅在新页面上出现 "RowEditing not handled" 错误

Question

我目前正在使用 Visual Studio 构建我的项目，我让它自动生成“编辑”按钮。我的 Gridview 允许通过搜索框进行搜索，一个页面最多只能处理 10 行。在第一次加载 Gridview 时，Edit 按钮和随附的 Update 和 Cancel 完美运行美好的。但是，一旦我点击一个新页面，当我尝试点击编辑时它会触发这些错误（第二个错误是当我以某种方式显示更新和取消按钮时）：

The GridView 'ProjectTable' fired event RowEditing which wasn't handled.
The GridView 'ProjectTable' fired event RowCancelingEdit which wasn't handled.

这是怎么回事？这是我的 aspx 页面：

<head runat="server">
    <title></title>
    <style>
        .hiddencol 
        { 
            display: none; 
        }
     </style>
</head>
<body>
<form id="form1" runat="server">
<div>
    <asp:TextBox ID="SearchBox" runat="server"></asp:TextBox>
    <asp:DropDownList ID="SearchParameterList" runat="server">
        <asp:ListItem Selected="True" Value="Project_Name">Project Name</asp:ListItem>
        <asp:ListItem Value="Product">Product</asp:ListItem>
        <asp:ListItem Value="Description">Description</asp:ListItem>
    </asp:DropDownList>
    <asp:Button ID="SearchButton" runat="server" Text="Search" OnClick="SearchButton_Click" />
    <asp:Button ID="ClearButton" runat="server" OnClick="ClearButton_Click" Text="Clear" />
    <br />
    <br />

    <asp:GridView ID="ProjectTable" runat="server" Font-Names="Verdana,Arial" Font-Size="12px" AutoGenerateColumns="False" AutoGenerateEditButton="True" DataSourceID="PopulateProjectTable" AllowPaging="True" OnPageIndexChanging="ProjectTable_PageIndexChanging>
        <AlternatingRowStyle BackColor="#BFE4FF" />
        <PagerStyle BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" />
        <HeaderStyle Height="30px" BackColor="#6DC2FF" Font-Size="12px" BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" />
        <RowStyle Height="20px" Font-Size="12px" BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" />
        <Columns>
            <asp:BoundField DataField="ProjID" HeaderText="ProjID" ItemStyle-CssClass="hiddencol" HeaderStyle-CssClass="hiddencol" SortExpression="ProjID" />
            <asp:BoundField DataField="Project_Name" HeaderText="Project Name Value" ReadOnly="True" SortExpression="Project_Name" />
            <asp:BoundField DataField="Product" HeaderText="Product" SortExpression="Product" ReadOnly="True" />
            <asp:BoundField DataField="Product_Edit" HeaderText="Product (alternate)" SortExpression="Product_Edit" />
            <asp:BoundField DataField="Description" HeaderText="Description" ReadOnly="True" SortExpression="Description" />
            <asp:BoundField DataField="Description_Edit" HeaderText="Description (alternate)" SortExpression="Description_Edit" />
            <asp:BoundField DataField="Comment" HeaderText="Comment Submission/Approval" SortExpression="Comment" />
        </Columns>
    </asp:GridView>
    <asp:SqlDataSource ID="PopulateProjectTable" runat="server" 
        ConnectionString="<%$ ConnectionStrings:ODSConnectionString %>" 
        SelectCommand="SELECT [Project_Name], [Product], [Product_Edit], [Description], [Description_Edit], [Comment], [ProjID] FROM [Pipeline_Detail]" 
        UpdateCommand="UPDATE [Pipeline_Detail] SET Product_Edit = @Product_Edit, Description_Edit= @Description_Edit, Comment = @Comment WHERE ProjID = @ProjID">
        <UpdateParameters>
            <asp:Parameter Name="ProjID"/>
            <asp:Parameter Name="Product_Edit" Type="String"/>
            <asp:Parameter Name="Description_Edit" Type="String"/>        
            <asp:Parameter Name="Comment" Type="String"/>
        </UpdateParameters>
    </asp:SqlDataSource>

</div>
</form>

下面是我的代码：

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void SearchButton_Click(object sender, EventArgs e)
    {
        ProjectTable.PageIndex = 0;
        ProjectTable.DataSourceID = null;
        PopulateProjectTable.SelectCommand = "SELECT [Project_Name], [Product], [Product_Edit], [Description], [Description_Edit], [Comment], [ProjID] FROM [Pipeline_Detail] WHERE " + SearchParameterList.SelectedValue.ToString() + " LIKE '%" + SearchBox.Text + "%'";
        ProjectTable.DataSource = PopulateProjectTable;
        ProjectTable.DataBind();
    }

    protected void ClearButton_Click(object sender, EventArgs e)
    {
        ProjectTable.PageIndex = 0;
        ProjectTable.DataSourceID = null;
        PopulateProjectTable.SelectCommand = "SELECT [Project_Name], [Product], [Product_Edit], [Description], [Description_Edit], [Comment], [ProjID] FROM [Pipeline_Detail] WHERE Project_Name LIKE '%%'";
        ProjectTable.DataSource = PopulateProjectTable;
        ProjectTable.DataBind();
        SearchBox.Text = "";
    }

    protected void ProjectTable_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        ProjectTable.PageIndex = e.NewPageIndex;
        ProjectTable.DataSourceID = null;
        PopulateProjectTable.SelectCommand = "SELECT [Project_Name], [Product], [Product_Edit], [Description], [Description_Edit], [Comment], [ProjID] FROM [Pipeline_Detail] WHERE " + SearchParameterList.SelectedValue.ToString() + " LIKE '%" + SearchBox.Text + "%'" ;
        ProjectTable.DataSource = PopulateProjectTable; 
        ProjectTable.DataBind();

    }
}

Answer 1

您需要实施这些事件。在您的标记中，您将自动生成编辑按钮设置为 true，但您从未实现 On Row Editing 事件和 On Row Cancelling Edit 事件。将您的标记更新为：

<asp:GridView ID="ProjectTable" runat="server" Font-Names="Verdana,Arial" Font-Size="12px" AutoGenerateColumns="False" AutoGenerateEditButton="True" DataSourceID="PopulateProjectTable" AllowPaging="True" OnPageIndexChanging="ProjectTable_PageIndexChanging" OnRowEditing="ProjectTable_OnRowEditing" OnRowCancelingEdit="ProjectTable_OnRowCancellingEdit">

然后将该方法添加到后面的代码中：

protected void ProjectTable_OnRowEditing(object sender, GridViewEditEventArgs e)
{

}

protected void ProjectTable_OnRowCancellingEdit(object sender, GridViewCancelEditEventArgs e)
{

}

Gridview 仅在新页面上出现 "RowEditing not handled" 错误

Gridview is giving the "RowEditing not handled" error only when on a new page

c#

asp.net

gridview

webforms