dev gridcontrol （二）绑定值控件拖动排序功能，序号

因为要做一个排序功能，弄了很久自带的功能都没法弄出来，最后自己写了一个方法来实现

绑定数据的时候用泛型，拖动的时候获到到选中的行和要上目行上的行号，再使用下面的方法

注册事件

protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
//添加事件
this.gridControl1.DragOver += new System.Windows.Forms.DragEventHandler(this.gridControl1_DragOver);
this.gridControl1.DragDrop += new System.Windows.Forms.DragEventHandler(this.gridControl1_DragDrop);
this.gridControl1.MouseDown += new MouseEventHandler(gridControl1_MouseDown);
this.gridControl1.MouseMove += new MouseEventHandler(gridControl1_MouseMove);
gridControl1.AllowDrop = true;
BindGrid(null);

}

绑定值

/// <summary>
/// 绑定数据
/// </summary>
/// <param name="modelList"></param>
private void BindGrid(List<OrderModel> modelList)
{
if (modelList == null)
{
modelList = new List<OrderModel>();
string sqlStr = "select functionid, functiontitle,loadorder from evbase_functionlist where parentid=" + ParentID + " order by loadorder asc";
DataTable dt = mNSCEVDBManager.GetDataTable(sqlStr, null);
foreach (DataRow dr in dt.Rows)
{
OrderModel model = new OrderModel() { ID = dr["FUNCTIONID"].ToString(), Title = dr["FUNCTIONTITLE"].ToString(), LoadOrder = dr["LOADORDER"].ToString() };
modelList.Add(model);
}

}
this.gridControl1.DataSource = modelList;
this.gridControl1.RefreshDataSource();
}

拖动的事件

#region
//<gridControl1>
private void gridControl1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
hitInfo = gridView1.CalcHitInfo(new Point(e.X, e.Y));
if (hitInfo.RowHandle < 0) hitInfo = null;
}

private void gridControl1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (hitInfo == null) return;
if (e.Button != MouseButtons.Left) return;
Rectangle dragRect = new Rectangle(new Point(
hitInfo.HitPoint.X - SystemInformation.DragSize.Width / 2,
hitInfo.HitPoint.Y - SystemInformation.DragSize.Height / 2), SystemInformation.DragSize);
if (!dragRect.Contains(new Point(e.X, e.Y)))
{
if (hitInfo.InRow)
{
gridControl1.DoDragDrop(new object[] { hitInfo.RowHandle, gridControl1 }, DragDropEffects.All);
}
}
}
//</gridControl1>

private int GetDragObject(object sender, IDataObject data)
{
object[] obj = data.GetData(typeof(object[])) as object[];
if (obj == null || !sender.Equals(gridControl1)) return -2;
if (obj[0] is Int32)
return (int)obj[0];
else return -1;
}

//<gridControl1>
private void gridControl1_DragOver(object sender, System.Windows.Forms.DragEventArgs e)
{
GridHitInfo hi = gridView1.CalcHitInfo(gridControl1.PointToClient(new Point(e.X, e.Y)));
int handle = GetDragObject(sender, e.Data);
if (hi.InRow && handle >= 0 && handle != hi.RowHandle)
{
if ((e.KeyState & 8) != 0)
e.Effect = DragDropEffects.Copy;
else
e.Effect = DragDropEffects.Move;
}
else e.Effect = DragDropEffects.None;
}

private void gridControl1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
var tempList = gridView1.DataSource as List<OrderModel>;
int currentID = GetDragObject(sender, e.Data);

GridHitInfo hi = gridView1.CalcHitInfo(gridControl1.PointToClient(new Point(e.X, e.Y)));
int newHandle = hi.RowHandle;
// int result = currentID - newHandle;
OrderModel model = tempList[currentID];

tempList.RemoveAt(currentID);
// tempList.Add(model);
tempList.Insert(newHandle, model);
BindGrid(tempList);
}
//</gridControl1>

private void gridView1_ShowingEditor(object sender, System.ComponentModel.CancelEventArgs e)
{
if (!MouseButtons.Equals(MouseButtons.None))
e.Cancel = true;
}
#endregion

显示序号

void gridView1_CustomDrawRowIndicator(object sender, DevExpress.XtraGrid.Views.Grid.RowIndicatorCustomDrawEventArgs e)
{
if (e.Info.IsRowIndicator && e.RowHandle >= 0)
{
e.Info.DisplayText = (e.RowHandle + 1).ToString();
}
}