using system;using system.data;using system.web.ui;using system.web.ui.webcontrols;namespace csdn
{
public class mycolumn:datagridcolumn
{ public string datatextfield; public string datavaluefield; public datatable datasource; public override void initializecell(tablecell cell,int columnindex,listitemtype itemtype) { base.initializecell(cell,columnindex,itemtype); switch(itemtype) { case listitemtype.header: cell.text=this.headertext; break; case listitemtype.item:case listitemtype.alternatingitem: cell.databinding+=new eventhandler(this.cell_itemdatabinding); break; case listitemtype.edititem: cell.databinding +=new eventhandler(cell_edititemdatabinding); dropdownlist ddl=new dropdownlist(); cell.controls.add(ddl); textbox t=new textbox(); t.width=80; cell.controls.add(t); button b=new button(); b.text="查找"; b.click+=new eventhandler(this.btn_click); cell.controls.add(b); break;
} } private void cell_itemdatabinding(object sender, eventargs e) { tablecell cell=(tablecell)sender; datagriditem dgi=(datagriditem)cell.namingcontainer; cell.text=(databinder.eval(dgi.dataitem,this.datatextfield)).tostring(); } private void cell_edititemdatabinding(object sender,eventargs e) { tablecell cell=(tablecell)sender; dropdownlist ddl=(dropdownlist)cell.controls[0]; datagriditem dgi=(datagriditem)cell.namingcontainer; for(int i=0;i<this.datasource.rows.count;i++) ddl.items.add(new listitem(this.datasource.rows[i][this.datatextfield].tostring(),this.datasource.rows[i][this.datavaluefield].tostring())); ddl.items.findbyvalue((databinder.eval(dgi.dataitem,this.datavaluefield)).tostring()).selected=true; } private void btn_click(object sender,eventargs e) { tablecell cell=(tablecell)(((button)sender).parent); dropdownlist ddl=(dropdownlist)cell.controls[0]; textbox t=(textbox)cell.controls[1]; datagriditem dgi=(datagriditem)cell.namingcontainer; listitem li=ddl.items.findbytext(t.text); if(li!=null) { ddl.selectedindex=-1; li.selected=true; } } }
}<%@ page language="c#" codebehind="webform67.aspx.cs" autoeventwireup="false" inherits="csdn.webform67" %><%@ register tagprefix="mydatagridcolumn" assembly="csdn" namespace="csdn"%><!doctype html public "-//w3c//dtd html 4.0 transitional//en" ><html> <head> <title>test</title> <meta http-equiv="content-type" content="text/html; charset=gb2312"> <meta content="microsoft visual studio .net 7.1" name="generator"> <meta content="c#" name="code_language"> <meta content="javascript" name="vs_defaultclientscript"> <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetschema"> <link href="css.css" type="text/css" rel="stylesheet"> </head> <body> <form id="form1" method="post" runat="server"> <asp:datagrid id="datagrid1" runat="server" datakeyfield="stuid" cellspacing="1" borderwidth="0px" oneditcommand="edit" oncancelcommand="cancel" onupdatecommand="update" cellpadding="5" cssclass="border" autogeneratecolumns="false"> <itemstyle cssclass="item"></itemstyle> <headerstyle cssclass="header"></headerstyle> <columns> <asp:boundcolumn headertext="姓名" datafield="stuname"></asp:boundcolumn> <mydatagridcolumn:mycolumn headertext="学院" datatextfield="depname" datavaluefield="depid"></mydatagridcolumn:mycolumn> <asp:editcommandcolumn buttontype="pushbutton" updatetext="更新" canceltext="取消" edittext="编辑"></asp:editcommandcolumn> </columns> </asp:datagrid> </form> </body></html>using system;using system.collections;using system.componentmodel;using system.data;using system.data.sqlclient;using system.drawing;using system.web;using system.web.sessionstate;using system.web.ui;using system.web.ui.webcontrols;using system.web.ui.htmlcontrols;namespace csdn{ /**//// <summary> /// webform67 的摘要说明。 /// </summary> public class webform67 : system.web.ui.page { protected system.web.ui.webcontrols.datagrid datagrid1; private void page_load(object sender, system.eventargs e) { // 在此处放置用户代码以初始化页面 if(!ispostback) { setbind(); } } protected void setbind() { sqlconnection conn=new sqlconnection(system.configuration.configurationsettings.appsettings["conn"]); sqldataadapter da=new sqldataadapter("select * from stu,dep where stu.studepid=dep.depid",conn); dataset ds=new dataset(); da.fill(ds); this.datagrid1.datasource=ds.tables[0]; this.datagrid1.databind(); } protected void edit(object sender,datagridcommandeventargs e) { this.datagrid1.edititemindex=e.item.itemindex; setbind(); } protected void cancel(object sender,datagridcommandeventargs e) { this.datagrid1.edititemindex=-1; setbind(); } protected void update(object sender,datagridcommandeventargs e) { if(e.item.itemtype==listitemtype.edititem) { sqlconnection conn=new sqlconnection(system.configuration.configurationsettings.appsettings["conn"]); sqlcommand comm=new sqlcommand("update stu set [email protected],[email protected] where [email protected]",conn); sqlparameter parm1=new sqlparameter("@name",sqldbtype.nvarchar,50); parm1.value=((textbox)e.item.cells[0].controls[0]).text; sqlparameter parm2=new sqlparameter("@depid",sqldbtype.int); parm2.value=((dropdownlist)e.item.cells[1].controls[0]).selectedvalue; sqlparameter parm3=new sqlparameter("@id",sqldbtype.int); parm3.value=this.datagrid1.datakeys[e.item.itemindex]; comm.parameters.add(parm1); comm.parameters.add(parm2); comm.parameters.add(parm3); conn.open(); comm.executenonquery(); conn.close(); this.datagrid1.edititemindex=-1; setbind(); } } web 窗体设计器生成的代码#region web 窗体设计器生成的代码 override protected void oninit(eventargs e) { // // codegen: 该调用是 asp.net web 窗体设计器所必需的。 // initializecomponent(); base.oninit(e); } /**//// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void initializecomponent() { this.datagrid1.itemdatabound += new system.web.ui.webcontrols.datagriditemeventhandler(this.datagrid1_itemdatabound); this.load += new system.eventhandler(this.page_load); } #endregion private void datagrid1_itemdatabound(object sender, system.web.ui.webcontrols.datagriditemeventargs e) { sqlconnection conn=new sqlconnection(system.configuration.configurationsettings.appsettings["conn"]); sqldataadapter da=new sqldataadapter("select * from dep",conn); dataset ds=new dataset(); da.fill(ds); ((mycolumn)this.datagrid1.columns[1]).datasource=ds.tables[0]; } }}新闻热点
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