有时我想隐藏 DataGridViewButtonColumn 中的按钮 [英] sometimes I want to hide buttons in a DataGridViewButtonColumn

问题描述

我有一个 DataGridView，它是上一个问题的主题 (链接).但有时按钮是null.这可以.但是如果它为空，有什么方法可以选择删除/添加(显示/隐藏?)按钮到按钮的 DataGridViewButtonColumn

I have a DataGridView which was the subject of a previous question (link). But sometimes the Button is null. This is fine. But if it is null, is there any way I can optionally remove/add (show/hide?) buttons to the DataGridViewButtonColumn of Buttons

像这样:

+------------+------------+
| MyText     | MyButton   |
+------------+------------+
| "do this"  | (Yes)      |
| "do that"  | (Yes)      |
| FYI 'blah' |            | <---- this is where I optionally want no button
| "do other" | (Yes)      |
+------------+------------+

这是我到目前为止所尝试的(基于这个例子)

this is what I have tried so far (based on this example)

private void grdVerdict_CellFormat(object sender, DataGridViewCellFormattingEventArgs e)
{
   if (e.ColumnIndex == grdChoice.Columns["yesbutton"].Index)
   {
       if (grdVerdict[e.ColumnIndex, e.RowIndex].Value == null)
       {
            //grdVerdict[e.ColumnIndex, e.RowIndex].Visible = false; //<-says 'it is read only'
            //grdVerdict[e.ColumnIndex, e.RowIndex].Value = new DataGridTextBox(); //<- draws 'mad red cross' over whole grid
            //((Button)grdVerdict[e.ColumnIndex, e.RowIndex]).Hide; //<- won't work
       }
       else
       {
          e.Value = ((Button)grdChoice[e.ColumnIndex, e.RowIndex].Value).Text;
       }
   }
}

推荐答案

我今天遇到了同样的问题".我还想隐藏某些行的按钮.玩了一段时间后，我发现了一个非常简单和不错的解决方案，它不需要任何重载的 paint()-functions 或类似的东西:

I had the same "problem" today. I also wanted to hide buttons of certain rows. After playing around with it for a while, I discovered a very simple and nice solution, that doesn't require any overloaded paint()-functions or similar stuff:

只需为这些单元格分配不同的 DataGridViewCellStyle.
关键是，您将此新样式的 padding 属性设置为一个值，该值将整个按钮移出单元格的可见区域.
而已！:-)

Just assign a different DataGridViewCellStyle to those cells.
The key is, that you set the padding property of this new style to a value that shifts the whole button out of the visible area of the cell.
That's it! :-)

示例:

System::Windows::Forms::DataGridViewCellStyle^  dataGridViewCellStyle2 = (gcnew System::Windows::Forms::DataGridViewCellStyle());
dataGridViewCellStyle2->Padding = System::Windows::Forms::Padding(25, 0, 0, 0);

dgv1->Rows[0]->Cells[0]->Style = dataGridViewCellStyle2;
// The width of column 0 is 22.
// Instead of fixed 25, you could use `columnwidth + 1` also.

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