DevExpress control library ---- LookUpEdit control and GridLookUpEdit control, gridlookupedit usage

DevExpress control library ---- LookUpEdit control and GridLookUpEdit control, gridlookupedit usage

DevExpress control library ---- use of the LookUpEdit control and GridLookUpEdit Control

I. Simple USE OF THE LookUpEdit control: The following is the basic data used.

Public class Product {public int Id {get; set;} public string Model {get; set;} public string Name {get; set ;}} public class Entility {private static string GetChar (int number) {string [] array = new string [] {"A", "B", "C", "D ", "E", "F", "G", "H", "I"}; string result = array [number % 9]; return result ;} private static string GetName (int number) {string [] array = {"Unitch Data Collector", "MS scanner", "105SL", "TSC", "PH880 ", "MS320 portable printer", "PA700", "DSX800 computer", "HP printer"}; string result = array [number % 9]; return result ;} public static List <Product> GetProductList () {List <Product> list = new List <Product> (); for (int I = 0; I <200; I ++) {Product product = new Product () {Id = 100 + I, Model = GetChar (I) + I. toString () + "DLJ", Name = GetName (I) + I. toString ()}; list. add (product) ;}return list;} public static DataTable GetDataTable () {DataTable dt = new DataTable (); dt. columns. add ("Id", typeof (System. int32); dt. columns. add ("Model", typeof (System. string); dt. columns. add ("Name", typeof (System. string); for (int I = 0; I <200; I ++) {DataRow dr = dt. newRow (); dr ["Id"] = 100 + I; dr ["Model"] = GetChar (I) + I. toString () + "DLJ"; dr ["Name"] = GetName (I) + I. toString (); dt. rows. add (dr) ;}return dt ;}}

First look at the effect:

Data Binding:

List<Product> list = Entility.GetProductList();lookUpEdit1.Properties.DataSource = list;

Add the displayed column: locate the attribute list-Add the column to be bound. If no column is added, columns are automatically generated based on the attribute name.

Simple property settings:

// Double-click the lookUpEdit1.Properties drop-down list. showDropDown = ShowDropDown. doubleClick; lookUpEdit1.Properties. immediatePopup = true; // The lookUpEdit1.Properties drop-down list is displayed. textEditStyle = TextEditStyles. standard; // allow the input of lookUpEdit1.Properties. dropDownRows = 12; // The default row lookUpEdit1.Properties. popupWidth = 350; // set the broadband lookUpEdit1.Properties. nullText = ""; // clear the default value

Ii. Simple use of the GridLookUpEdit Control
Effect:

Data Binding:

  List<Product> list = Entility.GetProductList();  gridLookUpEdit1.Properties.DataSource = list;

Add the displayed data column: bind the data to set the column width.

GridLoolUpEdit performs fuzzy filtering based on the fields bound to DisplayMember by default.

Set the filtering function based on multiple columns:

  private void FilterLookup(object sender)        {                       GridLookUpEdit edit = sender as GridLookUpEdit;            GridView gridView = edit.Properties.View as GridView;            FieldInfo fi = gridView.GetType().GetField("extraFilter", BindingFlags.NonPublic | BindingFlags.Instance);            BinaryOperator op1 = new BinaryOperator("Id", "%" + edit.AutoSearchText + "%", BinaryOperatorType.Like);            BinaryOperator op2 = new BinaryOperator("Model", "%" + edit.AutoSearchText + "%", BinaryOperatorType.Like);            BinaryOperator op3 = new BinaryOperator("Name", "%" + edit.AutoSearchText + "%", BinaryOperatorType.Like);            string filterCondition = new GroupOperator(GroupOperatorType.Or, new CriteriaOperator[] { op1, op2,op3 }).ToString();            fi.SetValue(gridView, filterCondition);            MethodInfo mi = gridView.GetType().GetMethod("ApplyColumnsFilterEx", BindingFlags.NonPublic | BindingFlags.Instance);            mi.Invoke(gridView, null);        }             private void gridLookUpEdit1_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e)        {            BeginInvoke(new MethodInvoker(delegate()            {                FilterLookup(sender);            }));        }

Display row numbers for filtered Columns

        private void gridLookUpEdit1View_CustomDrawRowIndicator(object sender, RowIndicatorCustomDrawEventArgs e)        {            if (e.Info.IsRowIndicator && e.RowHandle >= 0)            {                e.Info.DisplayText = (e.RowHandle + 1).ToString();            }        }

Some simple property settings:

// Double-click the gridLookUpEdit1.Properties drop-down list. showDropDown = ShowDropDown. doubleClick; gridLookUpEdit1.Properties. immediatePopup = true; // display the drop-down list gridLookUpEdit1.Properties. textEditStyle = TextEditStyles. standard; // you can enter gridLookUpEdit1.Properties. nullText = ""; // clear the default value

Set the width of the drop-down list

 

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