WPF以编程方式填充DataGrid [英] WPF Populate DataGrid programmatically

问题描述

我有一个包含DataGrid的页面.我需要从2个单独的来源中进行填充.我从文本文件中读取的前三列数据(列标题和随后的数据行).
之后，我需要添加1至100列，其中仅包含复选框.
我将创建第1 3列作为DataGridTextColumn类型，其余的列将作为DataGridCheckBoxColumn类型创建.
我*认为*我正确地做到了这点，除了三个问题.

1.我无法查看第1 3列中的数据.

2.当我尝试单击其余列中的复选框时，它们不会选中/取消选中

3.如果我双击复选框，则会收到错误消息-此视图不允许使用EditItem.

下面是创建此网格的代码.创建此对话框的Winforms版本时，我捕获了CurrentCellDirtyStateChanged提交了Checked/Unchecked状态，而CellValueChanged捕获了结果更改.这是我的复选框问题的一部分-我还没有找到WPF的等效项.
关于如何解决我的问题有什么建议吗?

I have a Page containing a DataGrid. I need to populate this from 2 separate sources. The 1st three columns of data I read from a text file (both the column headers, and the subsequent rows of data).
After that there is anywhere from 1 to 100 columns I need to add that will just contain checkboxes.
I''m creating the 1st 3 columns as type DataGridTextColumn, and the remaining columns I am creating as type DataGridCheckBoxColumn.
I *think* I''m doing this all correctly, except for three problems.

1. I can''t SEE the data in the 1st 3 columns.

2. When I try to click on the Checkboxes in the remaining columns they don''t Check / Uncheck

3. If I double-click the checkboxes I get an error - "EditItem is not allowed for this view.

Below is the code that creates this grid. When I created a Winforms version of this dialog, I trapped the CurrentCellDirtyStateChanged to commit the Checked/Unchecked state, and CellValueChanged to operate on the resulting change. That''s part of my Checkboxes problem - I haven''t found a WPF equivalent.
Any suggestions on how to solve my problems?

private void CreateMapSamplesToAssaysTable( )
{
    try
    {
        this.dgViewSamples.Items.Clear();
        this.dgViewSamples.Columns.Clear( );
        List<string> strColHeaders = new List<string>( );
        strColHeaders.Add( rm.GetString( "SampleIDColumnTitle" ) );
        strColHeaders.Add( rm.GetString( "SampleDescriptionColumnTitle" ) );
        strColHeaders.Add( rm.GetString( "DilutionFactorColumnTitle" ) );
        // Add columns and column header captions for the selected assays.
        int numAssays = data.SelectedAssays.Count;
        for( int nIdx = 0; nIdx < numAssays; nIdx++ )
        {
            string selectedAssayName = data.SelectedAssays[ nIdx ];
            strColHeaders.Add( selectedAssayName );
        }
        int nCols = strColHeaders.Count( );
        for( int nIdx = 0; nIdx < nCols; nIdx++ )
        {
            DataGridColumn col = null;
            switch( nIdx )
            {
                case 0:
                case 1:
                case 2:
                    col = new DataGridTextColumn( );
                    col.IsReadOnly = true;
                    break;
                default:
                    col = new DataGridCheckBoxColumn( );
                    col.IsReadOnly = false;
                    break;
            }
            col.Header = strColHeaders[ nIdx ];
            this.dgViewSamples.Columns.Add( col );
        }
        string strFileName = data.WorklistPath;
        StreamReader reader = new StreamReader( strFileName );
        string strLine = null;
        // Eat the first line, i.e. the column header
        strLine = reader.ReadLine( );
        while( ( strLine = reader.ReadLine( ) ) != null )
        {
            char[ ] chDelimiter = new char[ ] { ''\t'' };
            string[ ] strParts = strLine.Split( chDelimiter,
                StringSplitOptions.None );
            if( strParts.Length >= 3 )
            {
                string[] strRow = {strParts[0], strParts[1], strParts[2]};
                this.dgViewSamples.Items.Add( strRow );
            }
        }
        reader.Close( );
    }
    catch( Exception ex )
    {
        StackFrame sf = new StackFrame( );
        Errors.ErrorMessage( ex, sf, true );
    }
}</string></string>

推荐答案

您要添加(3 + data.SelectedAssays.Count)列数，但仅提供三个数据字段

you are adding (3 + data.SelectedAssays.Count) number of columns but supplying only three data fields

{strParts[0], strParts[1], strParts[2]};

因此，您必须指定数据将进入哪些所有列

so you have to specify for what all columns the data goes to

col.DisplayIndex = nIdx;
col.Header = strColHeaders[ nIdx ];
this.dgViewSamples.Columns.Add( col );

我建议使用DataTable而不是直接添加数据，因为列的类型不同.

谢谢

I suggest to use DataTable instead of direct data adding because the type of the columns are different.

thanks

只需输入e.Handled = true;在这两个事件中CurrentCellDirtyStateChanged CellValueChanged

我认为这会对您有所帮助.

Just put e.Handled = true; in both the events CurrentCellDirtyStateChanged CellValueChanged

I think it will help you.

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