ASP.NET 使用类对数据库进行增删改查操作

这是sqlHelper.cs类，类内里封装了方法

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

/// <summary>

///sqlHelper 的摘要说明

/// </summary>

public class sqlHelper

{

public sqlHelper()

{

//

//TODO: 在此处添加构造函数逻辑

//

}

public static readonly string sqlstr=ConfigurationManager.ConnectionStrings[“sqlcnn”].ConnectionString;

/// <summary>

/// 获取结果集的第一行第一列的结果

/// </summary>

/// <param name=”sqlText”>要执行的检索语句</param>

/// <param name=”paramss”>检索语句中的参数列表</param>

/// <returns></returns>

public static object ExecuteScalar(string sqlText,params SqlParameter[] paramss)

{

using (SqlConnection sqlcnn=new SqlConnection(sqlstr))

{

using (SqlCommand sqlcmm=sqlcnn.CreateCommand())

{

sqlcmm.CommandText = sqlText;

FillParam(paramss, sqlcmm);

sqlcnn.Open();

return sqlcmm.ExecuteScalar();

}

}

}//返回查找的第一行第一列

/// <summary>

/// 填充Command对象的参数列表

/// </summary>

/// <param name=”paramss”>参数列表</param>

/// <param name=”sqlcmm”>command对象</param>

private static void FillParam(SqlParameter[] paramss, SqlCommand sqlcmm)

{

foreach (SqlParameter param in paramss)

{

sqlcmm.Parameters.Add(param);

}

}//遍历参数

/// <summary>

/// 执行对数据库的增、删、改操作，并返回数据库中受影响的行数

/// </summary>

/// <param name=”sqlText”>要执行的insert、update、delete语句</param>

/// <param name=”paramss”>要执行的语句中的参数列表</param>

/// <returns></returns>

public static int ExecuteNonquery(string sqlText,params SqlParameter[] paramss)

{

using (SqlConnection sqlcnn=new SqlConnection(sqlstr))

{

using (SqlCommand sqlcmm=sqlcnn.CreateCommand())

{

sqlcmm.CommandText = sqlText;

FillParam(paramss,sqlcmm);

sqlcnn.Open();

return sqlcmm.ExecuteNonQuer
4000
y();

}

}

}//返回sqlcmm.ExcuteQuery()

/// <summary>

/// 获取检索结果集，返回DataTable

/// </summary>

/// <param name=”sqlText”>要执行的检索语句</param>

/// <param name=”paramss”>检索语句中的参数列表</param>

/// <returns></returns>

public static DataTable ExecteTable(string sqlText, params SqlParameter[] paramss)

{

using (SqlConnection sqlcnn=new SqlConnection(sqlstr))

{

using (SqlCommand sqlcmm=sqlcnn.CreateCommand())

{

sqlcmm.CommandText = sqlText;

FillParam(paramss,sqlcmm);

sqlcnn.Open();

using (SqlDataReader reader=sqlcmm.ExecuteReader())

{

DataTable dt = new DataTable();

dt.Load(reader);

return dt;

}

}

}

}//返回DataTable

}

下面是增删改查操作：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.SqlClient;

using System.Data;

public partial class Caozuo : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btnAdd_Click(object sender, EventArgs e)

{

string sqlstr = “insert into Denglu(Sname,Spassword)values(@name,@password)”;

int i = sqlHelper.ExecuteNonquery(sqlstr,new SqlParameter(“@name”,this.txtName.Text),new SqlParameter(“@password”,this.txtPassword.Text));

if (i > 0)

{

ClientScript.RegisterClientScriptBlock(GetType(), “提示”, “<script>alert(‘添加成功！’)</script>”, false);

}

else

{

ClientScript.RegisterClientScriptBlock(GetType(),”提示”,”<script>alert(‘添加失败！’)</script>”,false);

}

}

protected void btnDel_Click(object sender, EventArgs e)

{

string sqlstr = “delete from Denglu where Sname=@name”;

int i = sqlHelper.ExecuteNonquery(sqlstr,new SqlParameter(“@name”,this.txtName.Text));

if (i > 0)

{

ClientScript.RegisterClientScriptBlock(GetType(), “提示”, “<script>alert(‘删除成功！’)</script>”, false);

}

else

{

ClientScript.RegisterClientScriptBlock(GetType(), “提示”, “<script>alert(‘删除失败！’)</script>”, false);

}

}//删除

protected void btnEdit_Click(object sender, EventArgs e)

{

string sqlstr = “update Denglu set Spassword=@password where Sname=@name”;

int i = sqlHelper.ExecuteNonquery(sqlstr,new SqlParameter(“@name”,this.txtName.Text),new SqlParameter(“@password”,this.txtPassword.Text));

if (i > 0)

{

ClientScript.RegisterClientScriptBlock(GetType(), “提示”, “<script>alert(‘修改成功！’)</script>”, false);

}

else

{

ClientScript.RegisterClientScriptBlock(GetType(), “提示”, “<script>alert(‘修改失败！’)</script>”, false);

}

}//更改

protected void btnLook_Click(object sender, EventArgs e)

{

string sqlstr = “select Spassword from Denglu where Sname=@name”;

DataTable dt = sqlHelper.ExecteTable(sqlstr,new SqlParameter(“@name”,this.txtName.Text.Trim()));

this.txtPassword.Text = dt.Rows[0][0].ToString();

}//查找

protected void btnRefresh_Click(object sender, EventArgs e)

{

string sqlstr = “select * from Denglu”;

DataTable dt = sqlHelper.ExecteTable(sqlstr);

this.GridView1.DataSource = dt;

this.GridView1.DataBind();

}//刷新

}