(ASP.NET)修改和删除DataGrid行——数据库访问
懒得写了，把界面贴出来，照着界面画就可以了。本例数据库：sqlserver2000附带的pubs数据库，看一下连接字符串就很清楚了。如果要在本机器上运行，把uid和pwd改成你自己sql登陆用户名和密码。
创建一个web页面，命名为：add.aspx。
界面设计如图：
add.aspx代码：
<%@ page language="c#" codebehind="add.aspx.cs" autoeventwireup="false" inherits="teachshow.charpter7.accessdatabase.add" %>
add.asp.cs代码：
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 teachshow.charpter7.accessdatabase
{
///
/// add 的摘要说明。
///
public class add : system.web.ui.page
{
protected system.web.ui.webcontrols.textbox textbox1;
protected system.web.ui.webcontrols.textbox textbox2;
protected system.web.ui.webcontrols.textbox textbox3;
protected system.web.ui.webcontrols.textbox textbox4;
protected system.web.ui.webcontrols.linkbutton linkbutton1;
protected system.web.ui.webcontrols.datagrid datagrid1;
protected system.web.ui.webcontrols.textbox textbox5;
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(!this.ispostback)
{
this.bindgrid();
}
}
#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);
}
///
/// 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。
///
private void initializecomponent()
{
this.linkbutton1.click += new system.eventhandler(this.linkbutton1_click);
this.datagrid1.disposed += new system.eventhandler(this.datagrid1_disposed);
this.datagrid1.cancelcommand += new system.web.ui.webcontrols.datagridcommandeventhandler(this.datagrid1_cancelcommand);
this.datagrid1.editcommand += new system.web.ui.webcontrols.datagridcommandeventhandler(this.datagrid1_editcommand);
this.datagrid1.updatecommand += new system.web.ui.webcontrols.datagridcommandeventhandler(this.datagrid1_updatecommand);
this.datagrid1.deletecommand += new system.web.ui.webcontrols.datagridcommandeventhandler(this.datagrid1_deletecommand);
this.datagrid1.selectedindexchanged += new system.eventhandler(this.datagrid1_selectedindexchanged);
this.load += new system.eventhandler(this.page_load);
}
#endregion
private void linkbutton1_click(object sender, system.eventargs e)
{
addpublisher();
}
///
/// 添加
///
private void addpublisher()
{
string sql="insert into publishers(pub_id,pub_name,city,state,country) values(@pubid,@pubname,@city,@state,@country)";
sqlconnection con=new sqlconnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");
sqlcommand cmd=new sqlcommand(sql,con);
cmd.parameters.add(new sqlparameter("@pubid",sqldbtype.char,4));
cmd.parameters["@pubid"].value=this.textbox1.text;
cmd.parameters.add(new sqlparameter("@pubname",sqldbtype.varchar ,40));
cmd.parameters["@pubname"].value=this.textbox2.text;
cmd.parameters.add(new sqlparameter("@city",sqldbtype.char,20));
cmd.parameters["@city"].value=this.textbox3.text;
cmd.parameters.add(new sqlparameter("@state",sqldbtype.char,2));
cmd.parameters["@state"].value=this.textbox4.text;
cmd.parameters.add(new sqlparameter("@country",sqldbtype.varchar ,30));
cmd.parameters["@country"].value=this.textbox5.text;
cmd.connection.open();
cmd.executenonquery();
cmd.connection.close();
this.textbox1.text="";
this.textbox2.text="";
this.textbox3.text="";
this.textbox4.text="";
this.textbox5.text="";
this.bindgrid();
}
private void bindgrid()
{
sqlconnection con=new sqlconnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");
sqldataadapter mysqlcom=new sqldataadapter("select * from publishers where pub_id like '99%'",con);
dataset myds=new dataset();
mysqlcom.fill(myds,"publishers");
this.datagrid1.datasource=myds.tables["publishers"].defaultview ;
this.datagrid1.databind();
}
///
/// 点击编辑时触发事件
///
///
///
private void datagrid1_editcommand(object source, system.web.ui.webcontrols.datagridcommandeventargs e)
{
this.datagrid1.edititemindex=(int)e.item.itemindex;
this.bindgrid();
}
///
/// 点击取消时触发该事件。
///
///
///
private void datagrid1_cancelcommand(object source, system.web.ui.webcontrols.datagridcommandeventargs e)
{
this.datagrid1.columns[0].headertext="已取消";
this.datagrid1.edititemindex=-1;
this.bindgrid();
}
private void datagrid1_selectedindexchanged(object sender, system.eventargs e)
{
}
///
/// 点击更新时触发该事件。
///
///
///
private void datagrid1_updatecommand(object source, system.web.ui.webcontrols.datagridcommandeventargs e)
{
sqlconnection con=new sqlconnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");
sqlcommand selectcmd=con.createcommand();
selectcmd.commandtype=commandtype.text;
selectcmd.commandtext="select * from publishers where pub_id like '99%'";
sqldataadapter sqladatper=new sqldataadapter();
sqladatper.selectcommand=selectcmd;
dataset ds=new dataset();
con.open();
sqladatper.fill(ds,"publishers");
con.close();
sqlcommand updatecmd=con.createcommand();
updatecmd.commandtext="update publishers set pub_name=@pubname,city=@city,state=@state,country=@country where pub_id=@pub_id";
sqlparameter pubnamepar=new sqlparameter("@pubname",sqldbtype.varchar,40,"pub_name");
updatecmd.parameters.add(pubnamepar);
sqlparameter citypar=new sqlparameter("@city",sqldbtype.varchar,20,"city");
updatecmd.parameters.add(citypar);
sqlparameter statepar=new sqlparameter("@state",sqldbtype.char,2,"state");
updatecmd.parameters.add(statepar);
sqlparameter countrypar=new sqlparameter("@country",sqldbtype.varchar,30,"country");
updatecmd.parameters.add(countrypar);
sqlparameter pubidpar=new sqlparameter("@pub_id",sqldbtype.char,4,"pub_id");
pubidpar.sourceversion=datarowversion.original;
updatecmd.parameters.add(pubidpar);
sqladatper.updatecommand=updatecmd;
datatable table=ds.tables["publishers"];
table.primarykey=new datacolumn[]
{
table.columns["pub_id"]
};
datarow row=table.rows.find(((textbox)(e.item.cells[2].controls[0])).text);
row["pub_name"]=((textbox)(e.item.cells[3].controls[0])).text;
row["city"]=((textbox)(e.item.cells[4].controls[0])).text;
row["state"]=((textbox)(e.item.cells[5].controls[0])).text;
row["country"]=((textbox)(e.item.cells[6].controls[0])).text;
con.open();
sqladatper.update(table);
con.close();
this.datagrid1.edititemindex=-1;
this.bindgrid();
}
///
/// 点击删除时触发该事件
///
///
///
private void datagrid1_deletecommand(object source, system.web.ui.webcontrols.datagridcommandeventargs e)
{
sqlconnection con=new sqlconnection("server=accp-lzh;uid=sa;pwd=sasa;database=pubs");
sqlcommand selectcmd=con.createcommand();
selectcmd.commandtext="select * from publishers where pub_id like '99%'";
sqlcommand deletecmd=con.createcommand();
deletecmd.commandtext="delete from publishers where pub_id=@pub_id";
sqlparameter pubidpar=new sqlparameter("@pub_id",sqldbtype.char,4,"pub_id");
pubidpar.sourceversion=datarowversion.original;
deletecmd.parameters.add(pubidpar);
sqldataadapter sqladapter=new sqldataadapter();
sqladapter.selectcommand=selectcmd;
sqladapter.deletecommand=deletecmd;
dataset ds=new dataset();
con.open();
sqladapter.fill(ds,"publishers");
datatable table=new datatable();
table=ds.tables["publishers"];
table.primarykey=new datacolumn[]//定义主键，便于查找
{
table.columns["pub_id"]
};
datarow row=table.rows.find(e.item.cells[2].text);
row.delete();
sqladapter.update(table);
con.close();
this.datagrid1.edititemindex=-1;
this.bindgrid();
}
private void datagrid1_disposed(object sender, system.eventargs e)
{
}
}
}