asp.net中怎样调用存储过程和存储过程的写法

asp.net中怎样调用存储过程和存储过程的写法

创建一个只有输入参数的存储过程

create procedure proc_user

@name varchar(20),

@Password varchar(100)

as

select * from loginuser

where name like @name

---创建一个有输入和输出参数的存储过程

create procedure proc_usertext

@name varchar(20),

@blog varchar(100) output

as

select @blog = blog from loginuser where name = @name

---创建一个有输入和返回参数的存储过程

create PROCEDURE returnval

@name varchar(100),

@blog varchar(100) output

AS

begin

select @blog = blog from loginuser where name = @name

if(@blog is null)

set @blog = ''你还没有申请博客''

return execute(@blog ) --数据数型的转换

end

在asp.net中的调用

protected void Page_Load(object sender, EventArgs e)

{

DataBind();

}

private void DataBind()

{

//只带输入参数的存储过程的写法。

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["strConnection"].ConnectionString);

SqlCommand cmd = new SqlCommand("proc_user", con);

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.AddWithValue("@name", "l%");

cmd.Parameters.AddWithValue("@Password", "lcs9702");

con.Open();

SqlDataReader dr = cmd.ExecuteReader();

DropDownList1.DataSource = dr;

DropDownList1.DataTextField = "name";

DropDownList1.DataValueField = "use_id";

DropDownList1.DataBind();

}

private void textDataBind()

{

//带输入，输出参数的存储过程的写法。

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["strConnection"].ConnectionString);

SqlCommand cmd = new SqlCommand("proc_usertext", con);

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.Add("@name", "love");

cmd.Parameters.Add("@blog", SqlDbType.VarChar,100);

cmd.Parameters["@blog"].Direction = ParameterDirection.Output;

//cmd.Parameters.Add(new SqlParameter("@blog",SqlDbType.VarChar,100,ParameterDirection.Output,false,0,0,string.Empty,DataRowVersion.Default,null));

cmd.CommandType = CommandType.StoredProcedure;

con.Open();

cmd.ExecuteNonQuery();

TextBox1.Text = cmd.Parameters["@blog"].Value.ToString();

con.Close();

}

private void returnDataBind()

{

//带输入，返回参数的存储过程的写法。

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["strConnection"].ConnectionString);

SqlCommand cmd = new SqlCommand("returnval", con);

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.Add("@name", "lcs9702");

cmd.Parameters.Add(new SqlParameter("@blog", SqlDbType.VarChar, 100, ParameterDirection.Output, false, 0, 0, string.Empty, DataRowVersion.Default, null));

cmd.CommandType = CommandType.StoredProcedure;

con.Open();

cmd.ExecuteNonQuery();

TextBox2.Text = cmd.Parameters["@blog"].Value.ToString();

con.Close();

}

protected void Button1_Click(object sender, EventArgs e)

{

textDataBind();

}

protected void Button2_Click(object sender, EventArgs e)

{

returnDataBind();

}