Xin chào các bạn, bài viết hôm nay mình sẽ hướng dẫn các bạn cách sử dụng Auto Suggest trong GridLookupEdit Devexpress C# Winform.

[DEVEXPRESS] AUTO SUGGEST IN GRIDLOOKUPEDIT C#

Từ phiên bản 19.2 trở lên, Devexpress để thêm tính năng AutoSuggest vào trong GridLookupEdit.

AutoSuggest là những gợi ý được hệ thống đưa ra nhằm giúp người dùng dễ dàng tìm kiếm dữ liệu hơn.

Các bạn cấu hình cho thuộc tính SearchMode như hình bên dưới.

Giao diện demo ứng dụng AutoSuggest GridLookupEdit Devexpress C# winform:

Source code C#:

using DevExpress.XtraEditors.Controls;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;
using Ftp_Client;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace T445356 {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        DataTable dt;
        private void Form1_Load(object sender, System.EventArgs e)
        {
            sqlserver sql = new sqlserver("xxx", "xxx", "xxx", "xxx");
            dt = sql.ExecuteQuery("select manv, tennv, dbo.ufn_removeMark(tennv) AS tennv_text from view_nhanvien");
            gridControl1.DataSource = dt;
            repositoryItemGridLookUpEdit1.DataSource = dt;
            repositoryItemGridLookUpEdit1.DisplayMember = "manv";
            repositoryItemGridLookUpEdit1.ValueMember = "manv";
            gridLookUpEdit1.Properties.DisplayMember = "manv";
            gridLookUpEdit1.Properties.ValueMember = "manv";           
            gridLookUpEdit1.Properties.TextEditStyle = TextEditStyles.Standard;
            gridLookUpEdit1.AutoSuggest += OnAutoSuggest;

        }
        void OnAutoSuggest(object sender, LookUpEditAutoSuggestEventArgs e)
        {
            e.SetMinimumAnimationDuration(TimeSpan.FromMilliseconds(1));
            e.QuerySuggestions = QueryAsync(e.Text, e.CancellationToken);
        }

        public Task<ICollection> QueryAsync(string text, CancellationToken cancellation)
        {

            return Task.Run(() => {
                return (from row in dt.AsEnumerable() where row["manv"].ToString().Contains(text) || row["tennv_text"].ToString().Contains(text.ToLower()) || row["tennv"].ToString().ToLower().Contains(text.ToLower()) select new { manv = row["manv"].ToString(), tennv = row["tennv"].ToString() }).ToList() as ICollection;
            });
        }

        private void repositoryItemGridLookUpEdit1_AutoSuggest(object sender, LookUpEditAutoSuggestEventArgs e)
        {
            e.SetMinimumAnimationDuration(TimeSpan.FromMilliseconds(50));
            e.QuerySuggestions = QueryAsync(e.Text, e.CancellationToken);
        }

        private void gridView1_ValidatingEditor(object sender, BaseContainerValidateEditorEventArgs e)
        {
            

            var view = (GridView)sender;
            var i = view.FocusedRowHandle;
                      
            switch (view.FocusedColumn.FieldName)
            {
                case "manv":
                    var text = e.Value.ToString();
                    var nhanvien = (from row in dt.AsEnumerable() where row["manv"].ToString() == text select new { manv = row["manv"].ToString(), tennv = row["tennv"].ToString() }).ToList();

                    view.SetRowCellValue(i, "tennv", nhanvien[0].tennv);
                   
                    break;
            }
        }

 

        private void gridView1_RowUpdated(object sender, DevExpress.XtraGrid.Views.Base.RowObjectEventArgs e)
        {
            if (e.RowHandle == GridControl.NewItemRowHandle)
            {            
                gridView1.FocusedColumn = gridView1.VisibleColumns[0];
            }
        }

        private void gridView1_RowCellStyle(object sender, RowCellStyleEventArgs e)
        {
            //GridView view = (GridView)sender;
            //DataRow row = view.GetDataRow(e.RowHandle);
            //if(row != null)
            //{
            //    if (row.RowState != DataRowState.Unchanged)
            //    {
            //        if (e.Column.UnboundType == DevExpress.Data.UnboundColumnType.Bound && row.HasVersion(DataRowVersion.Original))
            //        {
            //            if (!Equals(row[e.Column.FieldName, DataRowVersion.Current], row[e.Column.FieldName, DataRowVersion.Original]))
            //            {
            //                e.Appearance.BackColor = Color.Pink;
            //                e.Appearance.ForeColor = Color.White;

            //            }
            //        }
            //    }

           // }
        }
    }
}

Thank for watching!

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