C＃DataGridView在右键单击位置打开ContextMenu [英] C# DataGridView opening ContextMenu at location of Right Click

问题描述

我已经寻找了很长一段时间，现在正在寻找一个可行的解决方案，但是我想问一个问题：

我在对话框表单中有一个DataGridView在我的应用中，我希望ContextMenu出现在单元格的右键单击上。

我单击鼠标右键，然后ContextMenu可以正常显示，但是无论采用哪种解决方案在我尝试的StackExchange上，它总是偏移很多。

这与表单和/或父表单有关吗？还是我只是在这里愚蠢地丢失了一些东西？

感谢
Jamie

表格。 cs

  private void dataGridContents_CellMouseDown（object sender，DataGridViewCellMouseEventArgs e）
 {
 if（ e.Button == MouseButtons.Right）
 {
 if（e.RowIndex< -1&& e.ColumnIndex> -1）
 {
调试。 WriteLine（单元格单击右键！）; 
 
 DataGridViewCell单元格=（发送为DataGridView）[e.ColumnIndex，e.RowIndex]; 
 
 contextCell.Show（cell.DataGridView，PointToClient（Cursor.Position））; 
 
 if（！cell.Selected）
 {
 cell.DataGridView.ClearSelection（）; 
 cell.DataGridView.CurrentCell =单元格; 
 cell.Selected = true; 
} 
} 
} 
} 
  

编辑

抱歉，我已经尝试过：

• 新点（eX，eY）


• 新点（e.Location.X，e.Location。 Y）


• 新点（MousePosition.X，MousePosition.Y）


• PointToClient（eX，eY）


• new Point（Cursor.Position.X， Cursor.Position.Y）


• Control.MousePosition


• Cursor.Position

以及其他一些

编辑2

这就是我所说的偏移量-一些解决方案会导致这种情况偏移量在一定程度上有所不同（有些距离很远等等）-但所有偏移量都与实际光标的偏移量一样。 i.stack.imgur.com/k0XfF.png rel = nofollow noreferrer>

编辑3

我的 contextCell 是新的ContextMenu（）

解决方案

选项1：对于行显示上下文菜单，最简单的解决方案是将上下文菜单分配给 RowTemplate.ContextMenuStrip DataGridView的属性：

  dataGridView1.RowTemplate.ContextMenuStrip = contextMenuStrip1; 
  

选项2：另外，如果您想在显示 ContextMenuStrip ，足以处理 CellContextMenuStripNeeded 事件：

 私有无效dataGridView1_CellContextMenuStripNeeded（对象发送者，
 DataGridViewCellContextMenuStripNeededEventArgs e）
 {
 if（e.RowIndex> -1&& e.ColumnIndex> -1）
 {
 dataGridView1.CurrentCell = dataGridView1.Rows [e.RowIndex] .Cells [e.ColumnIndex]; 
 e.ContextMenuStrip = contextMenuStrip1; 
} 
} 
  

---

您的错误是什么？

您正在计算鼠标在 DataGridView 中的位置错误的方式。您正在使用 PointToClient ，这意味着 this.PointToClient ，而您需要使用的方法DataGridView ，例如 dataGridView1.PointToClient ：

  myContextMenu.Show（dataGridView1，dataGridView1.PointToClient（Cursor.Position））; 
  

仅提供您的信息，您只需显示 ContextMenu 使用此代码，则无需使用 ContextMenuStrip 。

但我强烈建议您使用 ContextMenuStrip 。

I've looked around for quite a while now trying to find a working solution but am resorting to asking a question:

I have a DataGridView in a Dialog Form in my app, that I want a ContextMenu to appear on Right-Click of Cell.

I have the right-click and the ContextMenu appearing fine, however no matter what solution on StackExchange I attempt, it is always offset quite alot.

Is this to do with the form and/or it's parent? Or am I just stupidly missing something here?

Thanks Jamie

Form.cs

private void dataGridContents_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
    {
        if (e.RowIndex > -1 && e.ColumnIndex > -1)
        {
            Debug.WriteLine("Cell right clicked!");

            DataGridViewCell cell = (sender as DataGridView)[e.ColumnIndex, e.RowIndex];

            contextCell.Show(cell.DataGridView, PointToClient(Cursor.Position));

            if (!cell.Selected)
            {
                cell.DataGridView.ClearSelection();
                cell.DataGridView.CurrentCell = cell;
                cell.Selected = true;
            }
        }
    }
}

Edit

Sorry, I have tried:

• new Point(e.X, e.Y)
• new Point(e.Location.X, e.Location.Y)
• new Point(MousePosition.X, MousePosition.Y)
• PointToClient(e.X, e.Y)
• new Point(Cursor.Position.X, Cursor.Position.Y)
• Control.MousePosition
• Cursor.Position

and probably a few others.

Edit 2

This is what I mean by offset -- some of the solutions cause this offset to vary in certain magnitudes (some really far away etc) -- but all are offset like those from the actual Cursor.

Edit 3

My contextCell is a new ContextMenu()

解决方案

Option 1: The most simple solution for showing a context menu for rows is assigning the context menu to RowTemplate.ContextMenuStrip property of DataGridView:

dataGridView1.RowTemplate.ContextMenuStrip = contextMenuStrip1;

Option 2: Also if you want to select the cell before showing the ContextMenuStrip, it's enough to handle CellContextMenuStripNeeded event:

private void dataGridView1_CellContextMenuStripNeeded(object sender,
    DataGridViewCellContextMenuStripNeededEventArgs e)
{
    if (e.RowIndex > -1 && e.ColumnIndex > -1)
    {
        dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
        e.ContextMenuStrip = contextMenuStrip1;
    }
}

---

What was your mistake?

You are calculating the mouse position on the DataGridView in a wrong way. You are using PointToClient which means this.PointToClient, while you need to use the method of DataGridView, for example dataGridView1.PointToClient:

myContextMenu.Show(dataGridView1,dataGridView1.PointToClient(Cursor.Position));

Just for your information you can simply show ContextMenu using this code and there is no need to use ContextMenuStrip.

But I strongly recommend you to use ContextMenuStrip.

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