C#WPF - 如何删除DataGrid中的列

Question

我有这个简单的用户控件(XAML):

<UserControl x:Class="finalProject_ClientX.queryResults"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         mc:Ignorable="d" 
         d:DesignHeight="500" d:DesignWidth="500" Loaded="UserControl_Loaded">
<Grid Height="476" Background="#70BCE373">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="494" />
        <ColumnDefinition Width="0*" />
        <ColumnDefinition Width="6*" />
    </Grid.ColumnDefinitions>
    <DataGrid AutoGenerateColumns="true" Height="374" HorizontalAlignment="Left" Margin="27,51,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="448" SelectionChanged="dataGrid1_SelectionChanged" />
    <Label Content="Query Results" Height="54" HorizontalAlignment="Stretch" Margin="27,0,19,0" Name="label1" VerticalAlignment="Top" DataContext="{Binding}" FontFamily="Tunga" FontSize="36" FontWeight="Bold" FontStyle="Normal" Opacity="1" Foreground="#FF0059B3" HorizontalContentAlignment="Center" />
    <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="189,441,0,0" Name="button1" VerticalAlignment="Top" Width="75" />
</Grid>

我根据这个方法设置表行:

public void setList<T>(List<T> list)
{
    dataGrid1.ItemsSource = list;

    //dataGrid1.Columns.RemoveAt(1);
    dataGrid1.Columns[1].Visibility = Visibility.Collapsed; 
}

该方法获取通用列表,并在dataGrid中设置列表.但我得到另一个领域,这个领域没有包括在内.该字段是"ExtensionData". .

我尝试用以下行删除/隐藏此列:

dataGrid1.Columns[1].Visibility = Visibility.Collapsed; 

要么

dataGrid1.Columns.RemoveAt(1);

'1'因为它总是第一列('0'也不工作).我收到这个错误:

mscorlib.dll中发生未处理的"System.ArgumentOutOfRangeException"类型异常

附加信息:指数超出范围.必须是非负数且小于集合的大小.

Answer 1

添加AutoGeneratingColumn到您的DataGrid:

<DataGrid AutoGenerateColumns="true"
          AutoGeneratingColumn="DataGrid_OnAutoGeneratingColumn"/>

你的代码背后有一个方法:

private void DataGrid_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
if (e.PropertyName == "ExtensionData")
   {
       e.Column = null;
   }
}

这应该删除给定名称的不需要的列.但一般情况下,最好先从列表中删除不需要的列表项,然后再将列表提供给您DataGrid.真的不能列在你的列表中.