Background:
How to make ReadOnly cells scrollable in C1FlexGrid.
Steps to Complete:
You can make normal cells scrollable by taking it as a textbox at the time of Editing and make that textbox scrollable but what if the cells are non-editable. Below is given the trick to achieve the same when cells are non-editable:
1. Create a TextBox and add it to the child control of the grid.
private TextBox textBoxForDisplay;
this.textBoxForDisplay = new TextBox();
this.textBoxForDisplay.ScrollBars = ScrollBars.Both;
this.textBoxForDisplay.Multiline = true;
//Make it readonly:
this.textBoxForDisplay.ReadOnly = true;
this.textBoxForDisplay.Visible = false;
this.c1FlexGrid1.Controls.Add(this.textBoxForDisplay);2. Handle the AfterSelChange event of FlexGrid to show the TextBox on the selected ReadOnly cell.
private void C1FlexGrid1_AfterSelChange(object sender, C1.Win.C1FlexGrid.RangeEventArgs e)
{
if (e.NewRange.LeftCol == 2)
{
this.textBoxForDisplay.Visible = true;
//Position of cell:
Rectangle rectCell = this.c1FlexGrid1.GetCellRect(e.NewRange.TopRow,
e.NewRange.LeftCol);
this.textBoxForDisplay.Location = rectCell.Location;
this.textBoxForDisplay.Size = rectCell.Size;
//Write Text to textbox:
this.textBoxForDisplay.Text = (string)this.c1FlexGrid1[e.NewRange.TopRow,
e.NewRange.LeftCol];
}
else
{
this.textBoxForDisplay.Visible = false;
}
}3. In the GotFocus event of TextBox, hide the blinking caret in the ReadOnly textbox cell as follows.
using System.Runtime.InteropServices;
[DllImport("user32")]
private static extern bool HideCaret(IntPtr hWnd);
private void TextBoxForDisplay_GotFocus(object sender, EventArgs e)
{
if (textBoxForDisplay.ReadOnly == true)
{
HideCaret(textBoxForDisplay.Handle);
}
}Prabhat Sharma