Error: CS0019: Operator '+' cannot be applied to operands of type 'TextBox' and 'TextBox' WPF + c# application

Question

所以我正在开发一个应用程序，该应用程序询问年龄、体重、身高、性别、姓名，并在单击按钮后生成 info.txt 并写入用户提供的信息

WPF:


<TextBox Margin="0,15,0,0" x:Name="txtName" Width="300" FontSize="18" materialDesign:HintAssist.Hint="Enter name" BorderThickness="2" BorderBrush="{DynamicResource MaterialDesignDivider}"  Style="{StaticResource MaterialDesignOutlinedTextBox}" />

<TextBox Margin="0,15,0,0" x:Name="txtWeight" Width="300" FontSize="18" materialDesign:HintAssist.Hint="Enter Weight (KG)" BorderThickness="2" BorderBrush="{DynamicResource MaterialDesignDivider}"  Style="{StaticResource MaterialDesignOutlinedTextBox}" />

<TextBox Margin="0,15,0,0" x:Name="txtHeight" Width="300" FontSize="18" materialDesign:HintAssist.Hint="Enter Height (CM)" BorderThickness="2" BorderBrush="{DynamicResource MaterialDesignDivider}"  Style="{StaticResource MaterialDesignOutlinedTextBox}" />

<TextBox Margin="0,15,0,0" x:Name="txtSex" Width="300" FontSize="18" materialDesign:HintAssist.Hint="Enter Sex (Male / Female)" BorderThickness="2" BorderBrush="{DynamicResource MaterialDesignDivider}"  Style="{StaticResource MaterialDesignOutlinedTextBox}" />

<Button  Margin="0,50,0,0" x:Name="loginBtn" Style="{StaticResource MaterialDesignFlatMidBgButton}" materialDesign:ShadowAssist.ShadowDepth="Depth0" Height="53" Width="300" materialDesign:ButtonAssist.CornerRadius="10" FontSize="18" Content="Create Profile" Click="doLogin"></Button>

C#

public void doLogin(object sender, RoutedEventArgs e)
        {
            try
            {
                TextWriter tw = new StreamWriter("info.txt", true);
                tw.WriteLine(txtAge + txtWeight + txtHeight + txtSex + txtName);
                tw.Close();

            }catch(Exception myE)
            {
                Console.Write(myE);
            }

            Console.Read();
        }

错误

Error: CS0019: Operator '+' cannot be applied to operands of type 'TextBox' and 'TextBox'

错误代码来自C#代码

Answer 1

您需要访问文本框的文本属性，而不是文本框本身。

tw.WriteLine(txtAge.Text + txtWeight.Text + txtHeight.Text + txtSex.Text + txtName.Text);

Error: CS0019: Operator '+' cannot be applied to operands of type 'TextBox' and 'TextBox' WPF + c# application

Error: CS0019: Operator '+' cannot be applied to operands of type 'TextBox' and 'TextBox' WPF + c# application

c#

wpf