.net简单web开发

新建空web项目

.net简单web开发

新建首页

.net简单web开发

index.asps 添加代码

<div>

<asp:TextBox ID="txt_test" runat="server"></asp:TextBox>
<asp:Button ID="btn_test" runat="server" Onclick="btn_test_Click" Text="保存"/>
</div>
<asp:Repeater ID="rpt_test" runat="server">
<ItemTemplate>
<div>
<%#Eval("DeptName")%>
</div>
</ItemTemplate>
</asp:Repeater>

index.aspx.cs 代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;

namespace WebApplication2
{
public partial class index : System.Web.UI.Page
{
static string strConn = ConfigurationManager.ConnectionStrings["myconn"].ToString();
SqlConnection conn = new SqlConnection(strConn);
protected void Page_Load(object sender, EventArgs e)
{
LoadInfo();
}

private void LoadInfo()
{
ConnectDB();
string strSql = @"select DeptName from E_Dept";
DataTable dt = ExecuteQuery(strSql);
rpt_test.DataSource = dt;
rpt_test.DataBind();
CloseDB();
}

protected void btn_test_Click(object sender,EventArgs e)
{
ConnectDB();
string strSql = @"insert into E_Dept (DeptName) values ('" + txt_test.Text + "')";
ExecuteNonQuery(strSql);
LoadInfo();
CloseDB();
}

public void ConnectDB()
{
try
{
conn = new SqlConnection(strConn);
conn.Open();
}
catch (Exception ex)
{

}
}

public void CloseDB()
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}

public DataTable ExecuteQuery(string sqlString)
{
try
{
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlString, conn);//从数据库中查询
da.Fill(ds);//将数据填充到DataSet
return ds.Tables[0];
}
catch (Exception ex)
{
return null;
}

}

public int ExecuteNonQuery(string sqlString)
{
try
{
SqlCommand cmd = new SqlCommand(sqlString, conn);
return cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
return -1;
}

}

}
}

数据库创建表E_Dept

Web.config 配置数据库连接

</connectionStrings>

运行

.net简单web开发