using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using DevExpress.XtraGrid.Views.Grid.ViewInfo;
namespace DevGridViewDragDropTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
SetDtSource();
GridViewInit();
BindGrid();
}
//鼠標座標
private GridHitInfo downHitInfo; //鼠標左鍵按下去時在GridView中的座標
private GridHitInfo upHitInfo; //鼠標左鍵彈起來時在GridView中的座標
private int startRow; // 拖拽的第一行
private int[] rows; //拖拽的所有行
//數據源
DataTable dtSource;
private void SetDtSource()
{
dtSource = new DataTable();
dtSource.Columns.Add("id", typeof(int));
dtSource.Columns.Add("name", typeof(string));
dtSource.Columns.Add("age", typeof(int));
dtSource.Columns.Add("add", typeof(string));
DataRow dr;
for (int i = 0; i < 20; i++)
{
dr = dtSource.NewRow();
dr["id"] = i;
if (i % 2 == 1)
{
dr["name"] = "小張" + i;
dr["age"] = 20 + i;
}
else
{
dr["name"] = "老李" + i;
dr["age"] = 10 + i;
}
dr["add"] = "陝西省西安市第" + i + "大道";
dtSource.Rows.Add(dr);
}
}
private void GridViewInit()
{
gridControl1.AllowDrop = true; // 確保能夠拖拽
gridView1.OptionsSelection.MultiSelect = true; //確保能夠多選
gridView1.OptionsSelection.EnableAppearanceFocusedCell = false; //確保選定行的背景色一樣
gridView1.OptionsSelection.EnableAppearanceFocusedCell = false; //確保選定行的背景色一樣。
gridView1.OptionsBehavior.Editable = false;
}
private void BindGrid()
{
gridControl1.DataSource = dtSource;
}
//鼠標按下事件
private void gridView1_MouseDown(object sender, MouseEventArgs e)
{
downHitInfo = gridView1.CalcHitInfo(new Point(e.X, e.Y)); //鼠標左鍵按下去時在GridView中的座標
}
//鼠標移動事件
private void gridView1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left) return; //不是左鍵則無效
if (downHitInfo == null || downHitInfo.RowHandle < 0) return; //判斷鼠標的位置是否有效
rows = gridView1.GetSelectedRows(); //獲取所選行的index
startRow = rows.Length == 0 ? -1 : rows[0];
DataTable dt = dtSource.Clone();
foreach (int r in rows) // 根據所選行的index進行取值,去除所選的行數據,可能是選取的多行
{
int dataSourcerows = gridView1.GetDataSourceRowIndex(r); //獲取行數據
dt.ImportRow(dtSource.Rows[dataSourcerows]); //保存所選取的行數據
}
gridControl1.DoDragDrop(dt, DragDropEffects.Move);//開始拖放操作,將拖拽的數據存儲起來
}
//拖拽過程事件
private void gridControl1_DragOver(object sender, DragEventArgs e)
{
e.Effect = DragDropEffects.Move;
}
//拖拽完成後事件
private void gridControl1_DragDrop(object sender, DragEventArgs e)
{
Point gridviewPoint = this.PointToScreen(this.gridControl1.Location); //獲取鼠標在屏幕上的位置。
upHitInfo = gridView1.CalcHitInfo(new Point(e.X - gridviewPoint.X, e.Y - gridviewPoint.Y)); //鼠標左鍵彈起來時在GridView中的座標(屏幕位置減去 gridView 開始位置)
if (upHitInfo == null || upHitInfo.RowHandle < 0) return;
int endRow = gridView1.GetDataSourceRowIndex(gridView1.GetDataSourceRowIndex(upHitInfo.RowHandle)); //獲取拖拽的目標行index
DataTable dt = e.Data.GetData(typeof(DataTable)) as DataTable; //獲取要移動的數據,從拖拽保存的地方:(gridControl1.DoDragDrop(dt, DragDropEffects.Move); )
if (dt != null && dt.Rows.Count > 0) //拖拽的數據爲空
{
int a;
DataRow xs = dtSource.Rows[endRow]; //獲取拖拽的目標行,準備進行移植
if (!rows.Contains(endRow)) //如果多選的話,確保不能拖拽到這幾個裏
{
gridView1.ClearSelection(); //從GirdView中刪除所拖拽的數據
int moveValue = 0;
foreach (int i in rows)
{
dtSource.Rows.Remove(dtSource.Rows[i - moveValue]); //從GirdView的數據源中刪除所拖拽的數據
moveValue++;
}
if (startRow > endRow)
a = dtSource.Rows.IndexOf(xs); //若果往上託,則加在鼠標到達行的上面
else
a = dtSource.Rows.IndexOf(xs) + 1; //如果往下拖,則加在鼠標到達行的下面
int j = 0;
DataRow drTemp;
foreach (DataRow dr in dt.Rows)
{
drTemp = dtSource.NewRow();
foreach (DataColumn dc in dr.Table.Columns)
{
drTemp[dc.ColumnName] = dr[dc.ColumnName];
}
dtSource.Rows.InsertAt(drTemp, a + j); //將拖拽的數據再次添加進來
gridView1.SelectRow(a + j);
j++;
}
gridView1.FocusedRowHandle = a;
}
gridControl1.DataSource = dtSource; //重新綁定
gridView1.RefreshData();
}
}
}
}