Gridview cell tooltip flickers

Question

Hello,
The default tool tip of a gridview cell isn't displayed long enough.
I tried a few solutions and almost all events but it's still flickering.
I solved it with the following code but then it doesn't appear in special situations (appears only for a few milliseconds). May be if i'm too fast with the mouse?!

I also wanted to show the tooltip only, if the cell text is truncated like in the default behaviour but is there an easy solution without measuring?

            _toolTip = new ToolTip();
            //_toolTip.AutomaticDelay = 100;
            _toolTip.AutoPopDelay = 30000;
            //_toolTip.ReshowDelay = 100;
            gvRightButton.ShowCellToolTips = false;

private static DataGridViewCell ccell;

    private void gvTest_CellMouseEnter(object sender, DataGridViewCellEventArgs e)
    {
        var cell = gvTest.Rows[e.RowIndex].Cells[e.ColumnIndex];
        if (e.ColumnIndex >= 1 & e.RowIndex >= 0 && cell != ccell)
        {
            ccell = cell;
            _toolTip.Show(gvTest.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString(), gvTest, 30000);
        }
    }

    private void gvTest_CellMouseLeave(object sender, DataGridViewCellEventArgs e)
    {
        if (!string.IsNullOrEmpty(_toolTip.GetToolTip(gvTest)))
        {
            _toolTip.Hide(gvTest);
        }
    }

Regards

Answer 1

Hi youki,
Maybe you can try to use ToolTip.SetToolTip() method.
Please refer to the following code:

ToolTip _toolTip;  
public Form1()  
{  
    InitializeComponent();  
        _toolTip = new ToolTip();  
    _toolTip.AutoPopDelay = 30000;  
    dataGridView1.ShowCellToolTips = false;  
    _toolTip.ShowAlways = true;  
    _toolTip.InitialDelay = 1000;  
    _toolTip.ReshowDelay = 500;  
}  
private int cellColumnIndex = -1;  
private int cellRowIndex = -1;  
private void dataGridView1_CellMouseMove(object sender, DataGridViewCellMouseEventArgs e)  
{  
  
           
  
    if (e.ColumnIndex != cellColumnIndex || e.RowIndex != cellRowIndex)  
    {  
        this._toolTip.Hide(this.dataGridView1);  
        cellColumnIndex = e.ColumnIndex;  
        cellRowIndex = e.RowIndex;  
        if (cellColumnIndex >= 0 && cellRowIndex >= 0)  
        {  
            this._toolTip.SetToolTip(this.dataGridView1, this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString());  
        }  
    }  
}  

The result:

Best Regards,
Daniel Zhang

---

If the response is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.