dev GridControl实现拖拽

一、示例说明

　　以gridControl1和gridControl2为例，从gridControl1拖拽行到gridControl2中去。

二、属性设置

gridControl2.AllowDrop = true;
gridControl1.AllowDrop = true;

三、事件代码：分别为GridControl和gridview添加下列事件

#region Grid拖拽操作

GridHitInfo GriddownHitInfo = null;

#region 拖出
private void gridView1_MouseDown(object sender, MouseEventArgs e)
{
GridView view = sender as GridView;
GriddownHitInfo = null;
GridHitInfo hitInfo = view.CalcHitInfo(new Point(e.X, e.Y));

if (Control.ModifierKeys != Keys.None) return;
if (e.Button == MouseButtons.Left && hitInfo.RowHandle >= 0)
{
GriddownHitInfo = hitInfo;
}
}

private void gridView1_MouseMove(object sender, MouseEventArgs e)
{
GridView view = sender as GridView;
if (e.Button == MouseButtons.Left && GriddownHitInfo != null)
{
Size dragSize = SystemInformation.DragSize;
Rectangle dragRect = new Rectangle(new Point(GriddownHitInfo.HitPoint.X - dragSize.Width / 2,
GriddownHitInfo.HitPoint.Y - dragSize.Height / 2), dragSize);

if (!dragRect.Contains(new Point(e.X, e.Y)))
{
DataRow row = view.GetDataRow(GriddownHitInfo.RowHandle);
if (row != null)
{
view.GridControl.DoDragDrop(row, DragDropEffects.Move);
GriddownHitInfo = null;
DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = true;
}
}
}
}
#endregion

#region 拖入
private void gridControl2_DragOver(object sender, DragEventArgs e)
{

if (e.Data.GetDataPresent(typeof(DataRow)))
e.Effect = DragDropEffects.Move;
else
e.Effect = DragDropEffects.None;
}

private void gridControl2_DragEnter(object sender, DragEventArgs e)
{
e.Effect = DragDropEffects.Move;
}

private void gridControl2_DragDrop(object sender, DragEventArgs e)
{
try
{
DataRow dr = e.Data.GetData(typeof(DataRow)) as DataRow;
if (dr != null)
{
FillTreeData(sender, dr);
}
}
catch (Exception ex)
{
MessageBox.Show("系统提示", ex.Message, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}

void FillTreeData(object sender, DataRow dr)
{
this.gridView2.AddNewRow();
gridView2.SetFocusedRowCellValue("id", Guid.NewGuid().ToString());
gridView2.SetFocusedRowCellValue("name", dr["name"].ToString());
gridView2.SetFocusedRowCellValue("code", dr["code"].ToString());
}
#endregion

#endregion

四、多行拖拽

1、属性

gridControl2.AllowDrop = true;
gridControl1.AllowDrop = true;

设置gridview可以多行选择: gridView1.OptionsSelection.MultiSelect = true;

2、事件代码 :所有的DataRow 变为 List<DataRow>

#region Grid拖拽操作

GridHitInfo GriddownHitInfo = null;
#region 拖入
private void gridControl2_DragOver(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(typeof(List<DataRow>)))
e.Effect = DragDropEffects.Move;
else
e.Effect = DragDropEffects.None;
}

private void gridControl2_DragEnter(object sender, DragEventArgs e)
{
e.Effect = DragDropEffects.Move;

}

private void gridControl2_DragDrop(object sender, DragEventArgs e)
{
try
{
List<DataRow> drs = e.Data.GetData(typeof(List<DataRow>)) as List<DataRow>;
if (drs != null)
{
FillTreeData(sender, drs);
}
}
catch (Exception ex)
{
MessageBox.Show("系统提示", ex.Message, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}

void FillTreeData(object sender, List<DataRow> drs)
{
foreach (DataRow dr in drs)
{
this.gridView2.AddNewRow();
gridView2.SetFocusedRowCellValue("id", Guid.NewGuid().ToString());
gridView2.SetFocusedRowCellValue("name", dr["name"].ToString());
gridView2.SetFocusedRowCellValue("code", dr["code"].ToString());
}
}
#endregion

#region 拖出
private void gridView1_MouseDown(object sender, MouseEventArgs e)
{
GridView view = sender as GridView;
GriddownHitInfo = null;
GridHitInfo hitInfo = view.CalcHitInfo(new Point(e.X, e.Y));

if (Control.ModifierKeys != Keys.None) return;
if (e.Button == MouseButtons.Left && hitInfo.RowHandle >= 0)
{
GriddownHitInfo = hitInfo;
}
}

private void gridView1_MouseMove(object sender, MouseEventArgs e)
{
GridView view = sender as GridView;
if (e.Button == MouseButtons.Left && GriddownHitInfo != null)
{
Size dragSize = SystemInformation.DragSize;
Rectangle dragRect = new Rectangle(new Point(GriddownHitInfo.HitPoint.X - dragSize.Width / 2,
GriddownHitInfo.HitPoint.Y - dragSize.Height / 2), dragSize);

if (!dragRect.Contains(new Point(e.X, e.Y)))
{
int[] rowint = view.GetSelectedRows();
List<DataRow> row = new List<DataRow>();
foreach (int i in rowint)
{
row.Add(view.GetDataRow(i));
}
if (row != null && row.Count > 0)
{
view.GridControl.DoDragDrop(row, DragDropEffects.Move);
GriddownHitInfo = null;
DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = true;
}
}
}
}
#endregion
#endregion