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DevExpress XtraGridControl 拖拽调整行顺序

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发表于 2016-8-4 13:35:28 | 显示全部楼层 |阅读模式
using System;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraGrid.Views.Grid.ViewInfo;

namespace SwapRows
{
    /// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private DevExpress.XtraGrid.GridControl gridControl1;
        private DevExpress.XtraGrid.Views.Grid.GridView gridView1;
        private System.Data.DataSet dataSet1;
        private System.Data.DataTable dataTable1;
        private System.Data.DataColumn dataColumn1;
        private System.Data.DataColumn dataColumn2;
        private System.Data.DataColumn dataColumn3;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if ( disposing )
            {
                if ( components != null )
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.gridControl1 = new DevExpress.XtraGrid.GridControl();
            this.gridView1 = new DevExpress.XtraGrid.Views.Grid.GridView();
            this.dataSet1 = new System.Data.DataSet();
            this.dataTable1 = new System.Data.DataTable();
            this.dataColumn1 = new System.Data.DataColumn();
            this.dataColumn2 = new System.Data.DataColumn();
            this.dataColumn3 = new System.Data.DataColumn();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            ((System.ComponentModel.ISupportInitialize)(this.gridControl1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.gridView1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.dataSet1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.dataTable1)).BeginInit();
            this.SuspendLayout();
            // 
            // gridControl1
            // 
            this.gridControl1.AllowDrop = true;
            this.gridControl1.Dock = System.Windows.Forms.DockStyle.Left;
            this.gridControl1.Location = new System.Drawing.Point(0, 0);
            this.gridControl1.MainView = this.gridView1;
            this.gridControl1.Name = "gridControl1";
            this.gridControl1.Size = new System.Drawing.Size(419, 310);
            this.gridControl1.TabIndex = 0;
            this.gridControl1.ViewCollection.AddRange(new DevExpress.XtraGrid.Views.Base.BaseView[] {
            this.gridView1});
            this.gridControl1.DragOver += new System.Windows.Forms.DragEventHandler(this.gridControl1_DragOver);
            this.gridControl1.DragDrop += new System.Windows.Forms.DragEventHandler(this.gridControl1_DragDrop);
            // 
            // gridView1
            // 
            this.gridView1.GridControl = this.gridControl1;
            this.gridView1.Name = "gridView1";
            this.gridView1.OptionsBehavior.Editable = false;
            this.gridView1.OptionsView.NewItemRowPosition = DevExpress.XtraGrid.Views.Grid.NewItemRowPosition.Bottom;
            this.gridView1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.gridView1_MouseMove);
            this.gridView1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.gridView1_MouseDown);
            // 
            // dataSet1
            // 
            this.dataSet1.DataSetName = "NewDataSet";
            this.dataSet1.Locale = new System.Globalization.CultureInfo("en-US");
            this.dataSet1.Tables.AddRange(new System.Data.DataTable[] {
            this.dataTable1});
            // 
            // dataTable1
            // 
            this.dataTable1.Columns.AddRange(new System.Data.DataColumn[] {
            this.dataColumn1,
            this.dataColumn2,
            this.dataColumn3});
            this.dataTable1.TableName = "Table1";
            // 
            // dataColumn1
            // 
            this.dataColumn1.ColumnName = "ID";
            this.dataColumn1.DataType = typeof(int);
            // 
            // dataColumn2
            // 
            this.dataColumn2.ColumnName = "Keyword";
            // 
            // dataColumn3
            // 
            this.dataColumn3.ColumnName = "Order";
            this.dataColumn3.DataType = typeof(decimal);
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(425, 12);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(62, 20);
            this.button1.TabIndex = 1;
            this.button1.Text = "&Up";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(425, 46);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(62, 20);
            this.button2.TabIndex = 2;
            this.button2.Text = "&Down";
            this.button2.Click += new System.EventHandler(this.button2_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(499, 310);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.gridControl1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.gridControl1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.gridView1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.dataSet1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.dataTable1)).EndInit();
            this.ResumeLayout(false);

        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }

        void FillDataSet()
        {
            dataTable1.Rows.Add(new object[] { 1, "abstract", 1 });
            dataTable1.Rows.Add(new object[] { 2, "event", 2 });
            dataTable1.Rows.Add(new object[] { 3, "new", 3 });
            dataTable1.Rows.Add(new object[] { 4, "struct", 4 });
            dataTable1.Rows.Add(new object[] { 5, "as", 5 });
            dataTable1.Rows.Add(new object[] { 6, "explicit", 6 });
            dataTable1.Rows.Add(new object[] { 7, "null", 7 });
            dataTable1.Rows.Add(new object[] { 8, "switch", 8 });
            dataTable1.Rows.Add(new object[] { 9, "base", 9 });
            dataTable1.Rows.Add(new object[] { 10, "extern", 10 });
            dataTable1.Rows.Add(new object[] { 11, "object", 11 });
            dataTable1.Rows.Add(new object[] { 12, "this", 12 });
            dataTable1.Rows.Add(new object[] { 13, "bool", 13 });
            dataTable1.Rows.Add(new object[] { 14, "false", 14 });
            dataTable1.Rows.Add(new object[] { 15, "operator", 15 });
            dataTable1.Rows.Add(new object[] { 16, "throw", 16 });
            dataTable1.Rows.Add(new object[] { 17, "break", 17 });
            dataTable1.AcceptChanges();
        }

        private void Form1_Load(object sender, System.EventArgs e)
        {
            FillDataSet();
            gridControl1.DataSource = dataTable1;
            gridView1.PopulateColumns();
            gridView1.Columns[OrderFieldName].SortOrder = DevExpress.Data.ColumnSortOrder.Ascending;
            gridView1.OptionsCustomization.AllowSort = false;
            gridView1.OptionsView.ShowGroupPanel = false;
        }

        const string OrderFieldName = "Order";

        private void button1_Click(object sender, System.EventArgs e)
        {
            GridView view = gridView1;
            view.GridControl.Focus();
            int index = view.FocusedRowHandle;
            if ( index <= 0 )
                return;

            DataRow row1 = view.GetDataRow(index);
            DataRow row2 = view.GetDataRow(index - 1);
            object val1 = row1[OrderFieldName];
            object val2 = row2[OrderFieldName];
            row1[OrderFieldName] = val2;
            row2[OrderFieldName] = val1;

            view.FocusedRowHandle = index - 1;
        }

        private void button2_Click(object sender, System.EventArgs e)
        {
            GridView view = gridView1;
            view.GridControl.Focus();
            int index = view.FocusedRowHandle;
            if ( index >= view.DataRowCount - 1 )
                return;

            DataRow row1 = view.GetDataRow(index);
            DataRow row2 = view.GetDataRow(index + 1);
            object val1 = row1[OrderFieldName];
            object val2 = row2[OrderFieldName];
            row1[OrderFieldName] = val2;
            row2[OrderFieldName] = val1;

            view.FocusedRowHandle = index + 1;
        }

        GridHitInfo downHitInfo = null;

        private void gridView1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            GridView view = sender as GridView;
            downHitInfo = null;

            GridHitInfo hitInfo = view.CalcHitInfo(new Point(e.X, e.Y));
            if ( Control.ModifierKeys != Keys.None )
                return;
            if ( e.Button == MouseButtons.Left && hitInfo.InRow && hitInfo.RowHandle != GridControl.NewItemRowHandle )
                downHitInfo = hitInfo;
        }

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

                if ( !dragRect.Contains(new Point(e.X, e.Y)) )
                {
                    view.GridControl.DoDragDrop(downHitInfo, DragDropEffects.All);
                    downHitInfo = null;
                }
            }
        }

        private void gridControl1_DragOver(object sender, DragEventArgs e)
        {
            if ( e.Data.GetDataPresent(typeof(GridHitInfo)) )
            {
                GridHitInfo downHitInfo = e.Data.GetData(typeof(GridHitInfo)) as GridHitInfo;
                if ( downHitInfo == null )
                    return;

                GridControl grid = sender as GridControl;
                GridView view = grid.MainView as GridView;
                GridHitInfo hitInfo = view.CalcHitInfo(grid.PointToClient(new Point(e.X, e.Y)));
                if ( hitInfo.InRow && hitInfo.RowHandle != downHitInfo.RowHandle && hitInfo.RowHandle != GridControl.NewItemRowHandle )
                    e.Effect = DragDropEffects.Move;
                else
                    e.Effect = DragDropEffects.None;
            }
        }

        private void gridControl1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
        {
            GridControl grid = sender as GridControl;
            GridView view = grid.MainView as GridView;
            GridHitInfo srcHitInfo = e.Data.GetData(typeof(GridHitInfo)) as GridHitInfo;
            GridHitInfo hitInfo = view.CalcHitInfo(grid.PointToClient(new Point(e.X, e.Y)));
            int sourceRow = srcHitInfo.RowHandle;
            int targetRow = hitInfo.RowHandle;
            MoveRow(sourceRow, targetRow);
        }

        private void MoveRow(int sourceRow, int targetRow)
        {
            if ( sourceRow == targetRow || sourceRow == targetRow + 1 )
                return;

            GridView view = gridView1;
            DataRow row1 = view.GetDataRow(targetRow);
            DataRow row2 = view.GetDataRow(targetRow + 1);
            DataRow dragRow = view.GetDataRow(sourceRow);
            decimal val1 = (decimal)row1[OrderFieldName];
            if ( row2 == null )
                dragRow[OrderFieldName] = val1 + 1;
            else
            {
                decimal val2 = (decimal)row2[OrderFieldName];
                dragRow[OrderFieldName] = (val1 + val2) / 2;
            }
        }
    }
}


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转自:http://blog.csdn.net/jjhua/article/details/50649651
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