DataGridTemplateColumn：项目集合必须在使用ItemsSource前空。 [英] DataGridTemplateColumn : Items collection must be empty before using ItemsSource.

问题描述

为什么是错误code：

Why is the error code :

        <dg:DataGrid  Name="dataGrid" AutoGenerateColumns="False"                                  
                HeadersVisibility="Column" SelectedIndex="-1" Margin="0,315,0,0" Background="#FF484040" BorderBrush="#FF484040">
        <dg:DataGrid.Columns>
            <dg:DataGridTextColumn Binding="{Binding IdBook}" Header="IdBook"></dg:DataGridTextColumn>
            <dg:DataGridTextColumn Binding="{Binding NameBook}" Header="NameBook"></dg:DataGridTextColumn>
            <dg:DataGridTextColumn Binding="{Binding Author}" Header="Author"></dg:DataGridTextColumn>
        </dg:DataGrid.Columns>

        <dg:DataGridTemplateColumn Header="Delete">

            <dg:DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <Button Style="{DynamicResource GlassButton}" Background="{DynamicResource DeleteButton}">

                    </Button>
                </DataTemplate>
            </dg:DataGridTemplateColumn.CellTemplate>

            </dg:DataGridTemplateColumn>
    </dg:DataGrid>

以下code是正确的：

The following code is correct :

        <dg:DataGrid  Name="dataGrid" AutoGenerateColumns="False"                                  
                HeadersVisibility="Column" SelectedIndex="-1" Margin="0,315,0,0" Background="#FF484040" BorderBrush="#FF484040">
        <dg:DataGrid.Columns>
            <dg:DataGridTextColumn Binding="{Binding IdBook}" Header="IdBook"></dg:DataGridTextColumn>
            <dg:DataGridTextColumn Binding="{Binding NameBook}" Header="NameBook"></dg:DataGridTextColumn>
            <dg:DataGridTextColumn Binding="{Binding Author}" Header="Author"></dg:DataGridTextColumn>
        </dg:DataGrid.Columns>

    </dg:DataGrid>

但我不能添加按钮的DataGrid

But I can not be add button to datagrid

推荐答案

请模板列中DataGrid.Columns。

Keep template column inside DataGrid.Columns.

     <dg:DataGrid  Name="dataGrid" AutoGenerateColumns="False"                                  
            HeadersVisibility="Column" SelectedIndex="-1" Margin="0,315,0,0" Background="#FF484040" BorderBrush="#FF484040">
    <dg:DataGrid.Columns>
        <dg:DataGridTextColumn Binding="{Binding IdBook}" Header="IdBook"></dg:DataGridTextColumn>
        <dg:DataGridTextColumn Binding="{Binding NameBook}" Header="NameBook"></dg:DataGridTextColumn>
        <dg:DataGridTextColumn Binding="{Binding Author}" Header="Author"></dg:DataGridTextColumn>
       <dg:DataGridTemplateColumn Header="Delete">
             <dg:DataGridTemplateColumn.CellTemplate>
                 <DataTemplate>
                       <Button Style="{DynamicResource GlassButton}" Background="{DynamicResource DeleteButton}">
                         </Button>
            </DataTemplate>
        </dg:DataGridTemplateColumn.CellTemplate>
        </dg:DataGridTemplateColumn>
    </dg:DataGrid.Columns>
  </<dg:DataGrid>

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