在datgridview中如何检查一个单元格，特别是coulmn [英] how to check a cell in particular coulmn in datgridview

问题描述

我有以下方法在窗口格式的datagridview中显示一个组合框。我们如何传递参数，当它们控制特定列的任何单元格时，在datagridview的事件下。

  private void Show_Combobox（int iRowIndex，int iColumnIndex）
 {
 / / DESCRIPTION：显示所选网格中的COMBO BOX。 
 //参数：iRowIndex  - 网格的标识。 
 // iColumnIndex  - 网格的列号。 
 
 int x = 0; 
 int y = 0; 
 int Width = 0; 
 int height = 0; 
 
 //获取活动细胞的含义，与其结合。 
 Rectangle rect = default（Rectangle）; 
 rect = dataGridView1.GetCellDisplayRectangle（iColumnIndex，iRowIndex，false）; 
 x = rect.X + dataGridView1.Left; 
 y = rect.Y + dataGridView1.Top; 
 
 Width = rect.Width; 
 height = rect.Height; 
 
 comboBox1.SetBounds（x，y，Width，height）; 
 comboBox1.Visible = true; 
 comboBox1.Focus（）; 
} 
  

提前感谢

解决方案

您实际上可以使用 DataGridViewComboBoxCell 。

这里是一个关于如何做的例子：
为了做到这一点，你可以将控件投射到组合框的事件上，最适合你。


i已经选择了 EdittingControlShowing ，因为它在控件显示之后出现，即组合框已被点击，所以它会下降它的下拉方法：

  private void gridView1_EditingControlShowing（object sender，DataGridViewEditingControlShowingEventArgs e）
 {
 if（e.Control。 GetType（）== typeof（DataGridViewComboBoxEditingControl））
 {
（（ComboBox）e.Control）.DropDownStyle = ComboBoxStyle.DropDown; 
} 
} 
  

这样你就可以让用户进入他/她如果预设值不存在于 ComboBox 的项目。为了做到这一点，您可以采取自己的价值以下方法使用 CellValidating 事件：

  if（gridView1.CurrentCell.IsInEditMode）
 {
 if（gridView1.CurrentCell.GetType（）== typeof（DataGridViewComboBoxCell））
 {
 if（！（（DataGridViewComboBoxColumn ）gridView1.Columns [e.ColumnIndex]）Items.Contains（e.FormattedValue））
 {
（（DataGridViewComboBoxColumn）gridView1.Columns [e.ColumnIndex]）。Items.Add（e.FormattedValue ）; 
} 
} 
} 
  

这将添加输入到在这种情况下 ComboBox 单元格的项目。

i have following method to display a combobox in datagridview in window form .

how i pass argument in it, when their is control over any cell of particular column and under which event of datagridview .

private void Show_Combobox(int iRowIndex, int iColumnIndex)
{
    // DESCRIPTION: SHOW THE COMBO BOX IN THE SELECTED CELL OF THE GRID.
    // PARAMETERS: iRowIndex - THE ROW ID OF THE GRID.
    //             iColumnIndex - THE COLUMN ID OF THE GRID.

    int x = 0;
    int y = 0;
    int Width = 0;
    int height = 0;

    // GET THE ACTIVE CELL'S DIMENTIONS TO BIND THE COMBOBOX WITH IT.
    Rectangle rect = default(Rectangle);
    rect = dataGridView1.GetCellDisplayRectangle(iColumnIndex, iRowIndex, false);
    x = rect.X + dataGridView1.Left;
    y = rect.Y + dataGridView1.Top;

    Width = rect.Width;
    height = rect.Height;

    comboBox1.SetBounds(x, y, Width, height);
    comboBox1.Visible = true;
    comboBox1.Focus();
}

thanks in advance ....

解决方案

you can in fact use DataGridViewComboBoxCell for your purpose.

here is an example on how to : in order to do that, you can cast the control to a combobox on the event of the combobox that suits you best.
i have chosen EdittingControlShowing as it is raised after the control is shown i.e the combobox has been clicked so it would rase its drop down method:

private void gridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    if (e.Control.GetType() == typeof(DataGridViewComboBoxEditingControl))
    {
        ((ComboBox)e.Control).DropDownStyle = ComboBoxStyle.DropDown;
    }
}

this way you will let the user enter his/her own value if the preset value is not present in the ComboBox's Items.in order to do that you can take the following approach using the CellValidating Event:

if (gridView1.CurrentCell.IsInEditMode)
{
    if (gridView1.CurrentCell.GetType() == typeof(DataGridViewComboBoxCell))
    {
        if (!((DataGridViewComboBoxColumn)gridView1.Columns[e.ColumnIndex]).Items.Contains(e.FormattedValue))
        {
            ((DataGridViewComboBoxColumn)gridView1.Columns[e.ColumnIndex]).Items.Add(e.FormattedValue);
        }
    }
}

this will add the input to the items of the ComboBox cell in this case.

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