WinForm implementation of BindingSource-based method extension

This example shows the WinForm implementation of BindingSource-based method extension, shared for everyone for reference. Here's how:

The key code is as follows:

Using system;using system.collections.generic;using system.reflection;using system.windows.forms;namespace winformutilhelpv2{///<summary>///BindingSource tool classes based on. NET 2.0///</summary> public static class Bindin gSourceToolV2 {//<summary>///BindingSource//</summary>//<param name= "cont Rol ">Control</param>///<returns>BindingSource</returns> public static BindingSource Getbindin Gsource (This control control) {if (Control! = null) {PropertyInfo _finded = control. GetType ().        GetProperty ("DataSource"); if (_finded! = null) {Object _dbsource = _finded.          GetValue (control, NULL);          if (_dbsource! = null && _dbsource is BindingSource) {return _dbsource as BindingSource;    }}} return null; }///<summary>///from BindingSource///</summary>//<typeparam name= "T" > Generics</typeparam>//<param name= "Dbsource" >BindingSource</param>//<param name= "Match" > Delegate < /param>///<returns> conditional emigration number </returns> public static int remove<t> (this BindingSource dbsource,      Predicate<t> match) where t:class {int _count = 0; if (Dbsource! = null) {for (int i = 0; i < DbSource.List.Count; i++) {Object _cur = Dbsou Rce.          List[i];            if (Match ((T) _cur)) {dbSource.List.Remove (_cur);            _count++;          i--;    }}} return _count; }///<summary>///from BindingSource///</summary>/<typeparam name= "T" > Generics </typepa    ram>//<param name= "Dbsource" >BindingSource</param>///<param name= "Match" > Delegates </param> <returns> not found returns null</returns> public static T find<t> (this BindingSource dbsource, predicate <T> match) where T:class {T _finded = null; if (Dbsource! = null) {foreach (T-T in Dbsource.list) {if (match (t)) {_            finded = t;          Break    }}} return _finded; }///<summary>//from BindingSource to find the collection///</summary>//<typeparam name= "T" > Generics </type param>//<param name= "Dbsource" >BindingSource</param>///<param name= "Match" > Delegate </param&gt    ; <returns> returned null</returns> public static ilist<t> findall<t> if not found (this BindingSource      Dbsource, predicate<t> match) where T:class {ilist<t> _findedlist = null;        if (Dbsource! = null) {_findedlist = new list<t> ();          foreach (T-T in Dbsource.list) {if (match (t)) {_findedlist.add (t);    }}} return _findedlist; }  }}

The test code is as follows:

Using system;using system.collections.generic;using system.windows.forms;using winformutilhelpv2;using    Winformutilhelpv2test.models;namespace winformutilhelpv2test{public partial class Winbindingsourcetoolv2test:form {    Public Winbindingsourcetoolv2test () {InitializeComponent (); private void Winbindingsourcetoolv2test_load (object sender, EventArgs e) {ilist<person> _source = new      List<person> ();        for (int i = 0; i <, i++) {person _entity = new person (); _entity.        age = i; _entity.        Name = "Yanzhiwei" + i; _source.      ADD (_entity);    } datagridview1.setbindingsource (_source); The private void Button1_Click (object sender, EventArgs e) {Person _person = Datagridview1.getbindingsource ().      Find<person> (c = c.age = = 5); MessageBox.Show ("Condition lookup:" + _person! = null?)    "Find A.": "Not Found."); private void Button2_Click (object sender, EventArgs e) {int _count = DatagridvieW1. Getbindingsource ().      Remove<person> (c = c.age >= 5);    MessageBox.Show ("Successfully moved out:" + _count); private void Button3_Click (object sender, EventArgs e) {ilist<person> _personlist = Datagridview1.getb Indingsource ().      Findall<person> (c = c.age < 5); MessageBox.Show ("Condition lookup:" + _personlist! = null?)    "Find to" + _personlist.count + "A": "Not Found."); }}}///<summary>//DataGridView Setbindingsource//</summary>/<typeparam name= "T" ;ilist</typeparam>//<param name= "DataGrid" >dataGrid</param>///<param name= "source" > Generics &L      t;/param> public static void Setbindingsource<t> (this DataGridView dataGrid, ilist<t> source) {      bindinglist<t> _bindinglist = new bindinglist<t> (source);      BindingSource _source = new BindingSource (_bindinglist, NULL);    Datagrid.datasource = _source; }

The test results are as follows:

I hope that the examples described in this article can help you with C # program design!

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WinForm implementation of BindingSource-based method extension

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WinForm implementation of BindingSource-based method extension