Xin chào các bạn, bài viết hôm nay mình sẽ hướng dẫn các bạn cách DragDrop dùng để sắp xếp từng dòng trên GridView sử dụng Behavior Manager Devexpress C# Winform.

[DEVEXPRESS] Re Order Row in GridView C# winform using Behavior manager

Dưới đây là giao diện demo ứng dụng sắp xếp dữ liệu trên Gridview, dưới đây là giao diện demo ứng dụng:

Ở hình trên, các bạn thấy mình dễ dàng sắp xếp từng dòng theo ý muốn của mình.

Bên thanh công cụ, toolbox các bạn kéo behaviorManager vào project và cấu hình như hình bên dưới:

Full source code Re order drag and drop gridview devexpress C#:

using DevExpress.Utils.DragDrop;
using DevExpress.Utils.Drawing;
using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraGrid.Views.Grid.ViewInfo;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace reOrderGridView
{
    public partial class Form1 : DevExpress.XtraEditors.XtraForm
    {
        public Form1()
        {
            InitializeComponent();
            var datatable = new DataTable();
            datatable.Columns.Add("avatar", typeof(byte[]));
            datatable.Columns.Add("stt", typeof(int));
            datatable.Columns.Add("name", typeof(string));
            datatable.Columns.Add("address", typeof(string));
            datatable.Columns.Add("gender", typeof(string));
           

            datatable.Rows.Add(GetImageFromName("Nguyễn Thảo"), 1, "Nguyễn Thảo", "Bà Rịa Vũng Tàu", "Nam");
            datatable.Rows.Add(GetImageFromName("Nguyễn Thị Cẩm Tú"), 2, "Nguyễn Thị Cẩm Tú", "Kiên Giang", "Nữ");
            datatable.Rows.Add(GetImageFromName("Nguyễn Đình Tuyên"), 3, "Nguyễn Đình Tuyên", "Quảng Bình", "Nữ");
            datatable.Rows.Add(GetImageFromName("Nguyễn Phương Nhi"), 4, "Nguyễn Phương Nhi", "Quảng Bình", "Thừa Thiên Huế");
            datatable.Rows.Add(GetImageFromName("Võ Sơn Băng"), 5, "Võ Sơn Băng", "Vĩnh Long", "Nam");
            datatable.Rows.Add(GetImageFromName("Hoàng Thị Thảo"), 6, "Hoàng Thị Thảo", "Nghệ An", "Nữ");
            datatable.Rows.Add(GetImageFromName("Dương Quá"), 7, "Dương Quá", "Trung Quốc", "Nam");
            datatable.Rows.Add(GetImageFromName("Long Cô Cô"), 8, "Long Cô Cô", "Trung Quốc", "Nữ");

            gridControl1.DataSource = datatable;
            HandleBehaviorDragDropEvents();
           gridView1.OptionsBehavior.Editable = false;
        }

        public void HandleBehaviorDragDropEvents()
        {
            DragDropBehavior gridControlBehavior = behaviorManager1.GetBehavior<DragDropBehavior>(this.gridView1);
            gridControlBehavior.DragDrop += Behavior_DragDrop;
            gridControlBehavior.DragOver += Behavior_DragOver;
        }
        private void Behavior_DragOver(object sender, DragOverEventArgs e)
        {
            DragOverGridEventArgs args = DragOverGridEventArgs.GetDragOverGridEventArgs(e);
            e.InsertType = args.InsertType;
            e.InsertIndicatorLocation = args.InsertIndicatorLocation;
            e.Action = args.Action;
            Cursor.Current = args.Cursor;
            args.Handled = true;
           


        }
        private void Behavior_DragDrop(object sender, DevExpress.Utils.DragDrop.DragDropEventArgs e)
        {
            GridView targetGrid = e.Target as GridView;
            GridView sourceGrid = e.Source as GridView;
            if (e.Action == DragDropActions.None || targetGrid != sourceGrid)
                return;
            DataTable sourceTable = sourceGrid.GridControl.DataSource as DataTable;

            Point hitPoint = targetGrid.GridControl.PointToClient(Cursor.Position);
            GridHitInfo hitInfo = targetGrid.CalcHitInfo(hitPoint);

            int[] sourceHandles = e.GetData<int[]>();

            int targetRowHandle = hitInfo.RowHandle;           
            int targetRowIndex = targetGrid.GetDataSourceRowIndex(targetRowHandle);

            List<DataRow> draggedRows = new List<DataRow>();
            foreach (int sourceHandle in sourceHandles)
            {
                int oldRowIndex = sourceGrid.GetDataSourceRowIndex(sourceHandle);
                DataRow oldRow = sourceTable.Rows[oldRowIndex];
                draggedRows.Add(oldRow);
            }

            int newRowIndex;

            switch (e.InsertType)
            {
                case InsertType.Before:
                    newRowIndex = targetRowIndex > sourceHandles[sourceHandles.Length - 1] ? targetRowIndex - 1 : targetRowIndex;
                    for (int i = draggedRows.Count - 1; i >= 0; i--)
                    {
                        DataRow oldRow = draggedRows[i];
                        DataRow newRow = sourceTable.NewRow();
                        newRow.ItemArray = oldRow.ItemArray;
                        sourceTable.Rows.Remove(oldRow);
                        sourceTable.Rows.InsertAt(newRow, newRowIndex);
                    }
                    break;
                case InsertType.After:
                    newRowIndex = targetRowIndex < sourceHandles[0] ? targetRowIndex + 1 : targetRowIndex;
                    for (int i = 0; i < draggedRows.Count; i++)
                    {
                        DataRow oldRow = draggedRows[i];
                        DataRow newRow = sourceTable.NewRow();
                        newRow.ItemArray = oldRow.ItemArray;
                        sourceTable.Rows.Remove(oldRow);
                        sourceTable.Rows.InsertAt(newRow, newRowIndex);
                    }
                    break;
                default:
                    newRowIndex = -1;
                    break;
            }
            int insertedIndex = targetGrid.GetRowHandle(newRowIndex);
            targetGrid.FocusedRowHandle = insertedIndex;
            targetGrid.SelectRow(targetGrid.FocusedRowHandle);

            if (checkEdit1.Checked)
            {
                ReOrder();
            }
           
        }

        public byte[] GetImageFromName(string name)
        {
            var char_name = GetFirstAndLastLetterFromName(name);
            Size imageSize = new System.Drawing.Size(32, 32);
            Image img_name = GlyphPainter.CreateRoundedStubGlyph(defaultLookAndFeel1.LookAndFeel, imageSize, char_name);
            using (var ms = new MemoryStream())
            {
                img_name.Save(ms, ImageFormat.Png);
                return ms.ToArray();
            }
        }


        public string GetFirstAndLastLetterFromName(string name)
        {
            string first = name.Substring(0, 1);
            char[] charArray = name.ToCharArray();
            Array.Reverse(charArray);
            string last = new string(charArray);

            if (last.Contains(' '))
            {
                char[] splitchar = { ' ' };
                string[] temp = last.Split(splitchar);
                int b = temp[0].ToString().Length - 2;
                int c = temp[0].ToString().Length - 1;
                last = temp[0].ToString().Substring(c, 1);
            }
            else
            {
                return first.ToUpper();
            }

            return ConvertToUnsign(first + last).ToUpper();
        }

        Regex ConvertToUnsign_rg = null;

        public string ConvertToUnsign(string strInput)
        {
            if (ReferenceEquals(ConvertToUnsign_rg, null))
            {
                ConvertToUnsign_rg = new Regex("p{IsCombiningDiacriticalMarks}+");
            }
            var temp = strInput.Normalize(NormalizationForm.FormD);
            return ConvertToUnsign_rg.Replace(temp, string.Empty).Replace("đ", "d").Replace("Đ", "D").ToLower();
        }

        public void ReOrder()
        {
            var dataView = gridView1.DataSource as DataView;
            int index = 1;
            foreach (DataRowView rowView in dataView)
            {
                DataRow row = rowView.Row;
                row["stt"] = index;
                index++;
            }
        }

        private void btn_reorder_Click(object sender, EventArgs e)
        {
            ReOrder();
        }
    }
}

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