用WebService实现对数据库进行操作(添加+删除+修改)

表为User，字段有 编号： int id，用户名：string UserName，密码：string UserPwd

/// <summary>

/// 添加

/// </summary>

/// <param name="name">用户名</param>

/// <param name="pwd">密码</param>

/// <returns></returns>

[WebMethod]

public int Add(string name,string pwd)

{

SqlConnection conn = new SqlConnection("连接字符串");

conn.Open();

string sql = "intsert into User (UserName,UsersPwd) values(@UserName,@UsersPwd)";

SqlCommand cmd = new SqlCommand(sql, conn);

SqlParameter parn = new SqlParameter("@UserName", name);

cmd.Parameters.Add(parn);

SqlParameter parp = new SqlParameter("@UsersPwd", pwd);

cmd.Parameters.Add(parp);

int result = cmd.ExecuteNonQuery();

conn.Close();

cmd.Dispose();

return result;

}

/// <summary>

/// 修改

/// </summary>

/// <param name="name">用户名</param>

/// <param name="pwd">密码</param>

/// <param name="id">编号</param>

/// <returns></returns>

[WebMethod]

public int Update(string name, string pwd, int id)

{

SqlConnection conn = new SqlConnection("连接字符串");

conn.Open();

string sql = "update User set UserName=@UserName,UsersPwd=@UsersPwd where id=@id";

SqlCommand cmd = new SqlCommand(sql, conn);

SqlParameter parn = new SqlParameter("@UserName", name);

cmd.Parameters.Add(parn);

SqlParameter parp = new SqlParameter("@UsersPwd", pwd);

cmd.Parameters.Add(parp);

SqlParameter pari = new SqlParameter("@id", id);

cmd.Parameters.Add(pari);

int result = cmd.ExecuteNonQuery();

conn.Close();

cmd.Dispose();

return result;

}

/// <summary>

/// 删除

/// </summary>

/// <param name="id">编号</param>

/// <returns></returns>

[WebMethod]

public int Delete(int id)

{

SqlConnection conn = new SqlConnection("连接字符串");

conn.Open();

string sql = "delete from User where id=@id";

SqlCommand cmd = new SqlCommand(sql, conn);

SqlParameter pari = new SqlParameter("@id", id);

cmd.Parameters.Add(pari);

int result = cmd.ExecuteNonQuery();

conn.Close();

cmd.Dispose();

return result;

}