Dev GridView行拖拽

http://blog.csdn.net/keyrainie/article/details/8513802

http://www.cnblogs.com/qq4004229/archive/2012/05/28/2521611.html

http://www.cnblogs.com/zeroone/p/4176887.html

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();

}

//鼠标坐标

private GridHitInfo downHitInfo; //鼠标左键按下去时在GridView中的坐标

private GridHitInfo upHitInfo; //鼠标左键弹起来时在GridView中的坐标

private int startRow; // 拖拽的第一行

private int[] rows; //拖拽的所有行

//数据源

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"] = "小张" + i;

dr["age"] = 20 + i;

}

else

{

dr["name"] = "老李" + i;

dr["age"] = 10 + i;

}

dr["add"] = "陕西省西安市第" + i + "大道";

dtSource.Rows.Add(dr);

}

}

private void GridViewInit()

{

gridControl1.AllowDrop = true; // 确保能够拖拽

gridView1.OptionsSelection.MultiSelect = true; //确保能够多选

gridView1.OptionsSelection.EnableAppearanceFocusedCell = false; //确保选定行的背景色一样

gridView1.OptionsSelection.EnableAppearanceFocusedCell = false; //确保选定行的背景色一样。

gridView1.OptionsBehavior.Editable = false;

}

private void BindGrid()

{

gridControl1.DataSource = dtSource;

}

    //鼠标按下事件
    private void gridView1_MouseDown(object sender, MouseEventArgs e)
    {
        downHitInfo = gridView1.CalcHitInfo(new Point(e.X, e.Y));   //鼠标左键按下去时在GridView中的坐标
    }

    //鼠标移动事件
    private void gridView1_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.Button != MouseButtons.Left) return;        //不是左键则无效
        if (downHitInfo == null || downHitInfo.RowHandle < 0) return;   //判断鼠标的位置是否有效

        rows = gridView1.GetSelectedRows();  //获取所选行的index
        startRow = rows.Length == 0 ? -1 : rows[0];
        DataTable dt = dtSource.Clone();

        foreach (int r in rows)   // 根据所选行的index进行取值，去除所选的行数据，可能是选取的多行
        {
            int dataSourcerows = gridView1.GetDataSourceRowIndex(r); //获取行数据
            dt.ImportRow(dtSource.Rows[dataSourcerows]); //保存所选取的行数据
        }
       gridControl1.DoDragDrop(dt, DragDropEffects.Move);//开始拖放操作，将拖拽的数据存储起来
    }

    //拖拽过程事件
    private void gridControl1_DragOver(object sender, DragEventArgs e)
    {
        e.Effect = DragDropEffects.Move;
    }

    //拖拽完成后事件
    private void gridControl1_DragDrop(object sender, DragEventArgs e)
    {
        Point gridviewPoint = this.PointToScreen(this.gridControl1.Location);  //获取鼠标在屏幕上的位置。
        upHitInfo = gridView1.CalcHitInfo(new Point(e.X - gridviewPoint.X, e.Y - gridviewPoint.Y));   //鼠标左键弹起来时在GridView中的坐标（屏幕位置减去 gridView 开始位置）
        if (upHitInfo == null || upHitInfo.RowHandle < 0) return;

        int endRow = gridView1.GetDataSourceRowIndex(gridView1.GetDataSourceRowIndex(upHitInfo.RowHandle)); //获取拖拽的目标行index

        DataTable dt = e.Data.GetData(typeof(DataTable)) as DataTable;  //获取要移动的数据，从拖拽保存的地方：（gridControl1.DoDragDrop(dt, DragDropEffects.Move); ）

        if (dt != null && dt.Rows.Count > 0) //拖拽的数据为空
        {
            int a;
            DataRow xs = dtSource.Rows[endRow]; //获取拖拽的目标行，准备进行移植
            if (!rows.Contains(endRow))  //如果多选的话，确保不能拖拽到这几个里
            {
                gridView1.ClearSelection();  //从GirdView中删除所拖拽的数据
                int moveValue = 0;
                foreach (int i in rows)
                {
                    dtSource.Rows.Remove(dtSource.Rows[i - moveValue]);  //从GirdView的数据源中删除所拖拽的数据
                    moveValue++;
                }

                if (startRow > endRow)
                    a = dtSource.Rows.IndexOf(xs);  //若果往上托，则加在鼠标到达行的上面
                else
                    a = dtSource.Rows.IndexOf(xs) + 1;  //如果往下拖，则加在鼠标到达行的下面
                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); //将拖拽的数据再次添加进来
                    gridView1.SelectRow(a + j);
                    j++;
                }
                gridView1.FocusedRowHandle = a;
            }
            gridControl1.DataSource = dtSource; //重新绑定
            gridView1.RefreshData();
        }
    }
}

}