DragDrop in DataGrid

Can someone tell me how to Drop something in DataGrid.

private void Interaction_dgr_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
DataGrid.HitTestInfo hti = Interaction_dgr.HitTest(new Point(e.X, e.Y));

MessageBox.Show(hti.Column.ToString());
}
My HitTestInfo object return -1 when i'm trying to get Row and Column properties.

i think we both are on same track. i am doing the same thing.

what i did is like this.

1) this.dataGridAppGrid.AllowDrop = true;
this.dataGridAppGrid.DragEnter += new System.Windows.Forms.DragEventHandler(this.dataGridAppGrid_DragEnter);
this.dataGridAppGrid.DragDrop += new System.Windows.Forms.DragEventHandler(this.dataGridAppGrid_DragDrop);

implement dragover also if u want.

private void dataGridAppGrid_DragEnter(object sender, DragEventArgs e)
{
if ( e.Data.GetDataPresent("AptGrid.AppointmentLabel") )
e.Effect = DragDropEffects.All;
}

you need to check with whole namespace if ur draged item is a user control..

hope this helps a bit.

Paresh

Thank's for replay Pareshgh, but it don't help me .
I'm trying to grag a value from treeview control and drop it in DataGrig control , I have a right e.X and e.Y value of event , but when I make HitTrstInfo object Row and Column properties returns -1 .I realy do not understand what is the problem.

when u drag an item from tree then u need to set the object and when u get the drag recived in datagrid. then u need to convert back in proper format.
..

could you post ur source code .. may be something can be figured out.

Paresh

did you got some work around ?

Paresh

Hi .

I'll be happy if someone can told me where is my mistake.
This is my code:

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace testWin
{

public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.TreeView treeView1;
private System.Windows.Forms.Panel panel2;
private System.Windows.Forms.DataGrid dataGrid1;
private DataTable o_DataTable;

private System.ComponentModel.Container components = null;

public Form1()
{
InitializeComponent();
DataBind();
}

protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code

private void InitializeComponent()
{
this.panel1 = new System.Windows.Forms.Panel();
this.treeView1 = new System.Windows.Forms.TreeView();
this.panel2 = new System.Windows.Forms.Panel();
this.dataGrid1 = new System.Windows.Forms.DataGrid();
this.panel1.SuspendLayout();
this.panel2.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
this.SuspendLayout();
//
// panel1
//
this.panel1.Controls.AddRange(new System.Windows.Forms.Control[] {
this.treeView1});
this.panel1.Dock = System.Windows.Forms.DockStyle.Left;
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(120, 273);
this.panel1.TabIndex = 0;
//
// treeView1
//
this.treeView1.AllowDrop = true;
this.treeView1.Dock = System.Windows.Forms.DockStyle.Fill;
this.treeView1.ImageIndex = -1;
this.treeView1.Name = "treeView1";
this.treeView1.Nodes.AddRange(new System.Windows.Forms.TreeNode[] {
new System.Windows.Forms.TreeNode("Node0", new System.Windows.Forms.TreeNode[] {
new System.Windows.Forms.TreeNode("Node1"),
new System.Windows.Forms.TreeNode("Node3"),
new System.Windows.Forms.TreeNode("Node4"),
new System.Windows.Forms.TreeNode("Node5")})});
this.treeView1.SelectedImageIndex = -1;
this.treeView1.Size = new System.Drawing.Size(120, 273);
this.treeView1.TabIndex = 0;
this.treeView1.DragEnter += new System.Windows.Forms.DragEventHandler(this.treeView1_DragEnter);
this.treeView1.ItemDrag += new System.Windows.Forms.ItemDragEventHandler(this.treeView1_ItemDrag);
//
// panel2
//
this.panel2.Controls.AddRange(new System.Windows.Forms.Control[] {
this.dataGrid1});
this.panel2.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel2.Location = new System.Drawing.Point(120, 0);
this.panel2.Name = "panel2";
this.panel2.Size = new System.Drawing.Size(368, 273);
this.panel2.TabIndex = 1;
//
// dataGrid1
//
this.dataGrid1.AllowDrop = true;
this.dataGrid1.DataMember = "";
this.dataGrid1.Dock = System.Windows.Forms.DockStyle.Fill;
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(368, 273);
this.dataGrid1.TabIndex = 0;
this.dataGrid1.DragDrop += new System.Windows.Forms.DragEventHandler(this.dataGrid1_DragDrop);
this.dataGrid1.DragEnter += new System.Windows.Forms.DragEventHandler(this.dataGrid1_DragEnter);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(488, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.panel2,
this.panel1});
this.Name = "Form1";
this.Text = "Form1";
this.panel1.ResumeLayout(false);
this.panel2.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
this.ResumeLayout(false);

}
#endregion


[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void DataBind()
{
o_DataTable = new DataTable("Data");
DataColumn o_DataColumn = new DataColumn("Col1",typeof(string));
o_DataTable.Columns.Add(o_DataColumn);

o_DataColumn = new DataColumn("Col2",typeof(string));
o_DataTable.Columns.Add(o_DataColumn);

DataRow o_DataRow = o_DataTable.NewRow();
o_DataRow[0] = "A";
o_DataRow[1] = "B";
o_DataTable.Rows.Add(o_DataRow);

this.dataGrid1.DataSource = o_DataTable;


}

private void treeView1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.Text))
e.Effect = DragDropEffects.Copy;
else
e.Effect = DragDropEffects.None;
}

private void treeView1_ItemDrag(object sender, System.Windows.Forms.ItemDragEventArgs e)
{
string strItem = e.Item.ToString();
DoDragDrop(strItem, DragDropEffects.Copy | DragDropEffects.Move);

}

private void dataGrid1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
if ( e.Data.GetDataPresent(DataFormats.Text) )
e.Effect = DragDropEffects.Copy;

}

private void dataGrid1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
if ( e.Data.GetDataPresent(DataFormats.Text) )
{
e.Effect = DragDropEffects.Copy;
DataGrid.HitTestInfo hti = this.dataGrid1.HitTest(new Point(e.X, e.Y));
MessageBox.Show(hti.Column.ToString());
}
}
}
}

hi,
modify your drag-drop like following and test again.

private void dataGrid1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
if ( e.Data.GetDataPresent(DataFormats.Text) )
{
e.Effect = DragDropEffects.Copy;
Point pt = new Point(e.X,e.Y);
pt = dataGrid1.PointToClient(pt);
DataGrid.HitTestInfo hti = this.dataGrid1.HitTest(pt);
MessageBox.Show(hti.Column.ToString());
}
}


Hope this should work
-Paresh

;) Thank's, Pareshgh, it work!!!!

i m glad for u :D

I am a new member I am facing the same problem I just want to see weather I will get reply I am mailing you guys.If you can help me say so from there We can start Thanks