sqlhelper sqlparameter 实现增删改查

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.ExecuteNonQuery();

             }

         }

     }//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

}