Datagrid: Full Row Select and Other Options like in TaskVision

[Jason Hickey]

All,
Maybe I'm just missing it but how do you do the following three things
with a WinForms DataGrid...

1: Make it so when the user clicks on any part of a row the FULL row
becomes selected
2: Hide the add new row from the bottom of the grid
3: Remove the grey side bar from the left of the grid

For an example see the main grid in the TaskVision Demo at:
http://www.windowsforms.net/default.aspx?tabIndex=7&tabId=44

This is the EXACT grid I want. I took a look at the source and I can't seem
to find where they made the tweaks.

The dgGrid is of type System.Windows.Forms.DataGrid so it is still the basic
grid.

I'm pretty sure it is something from the class "public sealed class
MainFormDgStyle" but I can't seem to find what.

-Jason

 

[Morgan]

Did you look at the classes/ in the /ColumnStyles or folder? I believe it
would be in there, since so much of the layout for the datagrid derives from
the tablestyles in those classes.

 

[Uri Dor]

1. check out my code, which also enforces single selection (below)
2. ReadOnly = true
3. dunno

public class SSDataGrid : DataGrid
{
private int oldSelectedRow = -1;
private bool first_click = true;

public SSDataGrid() : base()
{
CurrentCellChanged += new EventHandler(EnforceSingleSelect);
}

/// <summary>
/// select a row and scroll to it
/// </summary>
/// <remarks>
/// sets input focus to the SSDataGrid
/// </remarks>
public new void Select(int row)
{
if(oldSelectedRow >= 0)
base.UnSelect(oldSelectedRow);
base.Select(row);
base.CurrentCell = new DataGridCell(row, 1);
}

private void EnforceSingleSelect(object sender, EventArgs e)
{
if(CurrentRowIndex != oldSelectedRow && -1 != oldSelectedRow)
UnSelect(oldSelectedRow);
oldSelectedRow = CurrentRowIndex;
// select whole row
// note: endless loop avoided since Select(CurrentRowIndex) won't
send a CurrentCellChanged event
Select(CurrentRowIndex);
}

protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
{
// don't call the base class if left mouse down,
// so dragging won't select multiple lines
if(e.Button != MouseButtons.Left)
base.OnMouseMove(e);
}

protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
{
//don't call the base class if in header
DataGrid.HitTestInfo hti = this.HitTest(new Point(e.X, e.Y));
if(hti.Type == DataGrid.HitTestType.Cell)
{
base.OnMouseDown(e);
if(first_click)
{
EnforceSingleSelect(/*dummy*/this, /*dummy*/e);
first_click = false;
}
}
else if(hti.Type == DataGrid.HitTestType.RowHeader)
{
if((Control.ModifierKeys & Keys.Shift) == 0)
base.OnMouseDown(e);
else
this.Select(hti.Row);
}
}

}

 

[Jason Hickey]

1: Thought of doing something like that until I saw taskvision
application... The MS guys have done it without created a derived class
from DataGrid?!? I would like to know HOW they did it
2: Duh... Thanks for that one
3: Again MS did it I would like to know the "trick". Basically it make a
data grid into a listview but with build in sort etc....

-Jason

 

[Scot Rose [MSFT]]

The full source for TaskVision seems to be available at the web site. Is there something missing from it?

http://www.windowsforms.net/TaskVision/SourceViewer.aspx?tabindex=7&tabid=44

Want to know more? Check out the MSDN Library at http://msdn.microsoft.com or the Microsoft Knowledge Base at http://support.microsoft.com

Scot Rose, MCSD
Microsoft Visual Basic Developer Support
Email : (e-mail address removed) <Remove word online. from address>

This posting is provided “AS IS”, with no warranties, and confers no rights.




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