.NET 调用存储过程详解

配置 App.config (注: 本文使用 Northwind 数据库为例)

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <add name="NorthwindConnectionString" connectionString="Data Source=.;Initial Catalog=Northwind;Integrated Security=True"
         providerName="System.Data.SqlClient" />
  </connectionStrings>
</configuration>

 获取连接字符串

string ConStr = ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString;

1. 返回单一记录集的存储过程

SqlConnection conn = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "Categoriestest1";

// 指定执行语句为存储过程
cmd.CommandType = CommandType.StoredProcedure;

SqlDataAdapter dp = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
dp.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();

存储过程Categoriestest1

CREATE PROCEDURE Categoriestest1
AS
select *
from  Categories
GO

2. 没有输入输出的存储过程

SqlConnection conn = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn ;
cmd.CommandText = "Categoriestest2";
cmd.CommandType = CommandType.StoredProcedure;
conn.Open();
Label1.Text = cmd.ExecuteNonQuery().ToString();
conn.Close();

存储过程Categoriestest2

CREATE PROCEDURE Categoriestest2  AS
insert into dbo.Categories
(CategoryName,[Description],[Picture])
values ('test1','test1',null)
GO

 

3. 有返回值的存储过程

SqlConnection conn = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "Categoriestest3";
cmd.CommandType = CommandType.StoredProcedure;

// 创建参数
IDataParameter[] parameters = { new SqlParameter("rval", SqlDbType.Int,4) };
// 将参数类型设置为 返回值类型
parameters[0].Direction = ParameterDirection.ReturnValue;
// 添加参数
cmd.Parameters.Add(parameters[0]);

conn.Open();
// 执行存储过程并返回影响的行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
conn.Close();
// 显示影响的行数和返回值
Label1.Text += "-" + parameters[0].Value.ToString();

存储过程Categoriestest3

CREATE PROCEDURE Categoriestest3
AS
insert into dbo.Categories
(CategoryName,[Description],[Picture])
values ('test1','test1',null)
return @@rowcount
GO

4. 有输入参数和输出参数的存储过程

SqlConnection conn = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "Categoriestest4";
cmd.CommandType = CommandType.StoredProcedure;

// 创建参数
IDataParameter[] parameters =
{
    new SqlParameter("@Id", SqlDbType.Int,4) ,
    new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,
};

// 设置参数类型
parameters[0].Direction = ParameterDirection.Output;  // 设置为输出参数
parameters[1].Value = "testCategoryName";

// 添加参数
cmd.Parameters.Add(parameters[0]);
cmd.Parameters.Add(parameters[1]);

conn.Open();
// 执行存储过程并返回影响的行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
conn.Close();
// 显示影响的行数和输出参数
Label1.Text += "-" + parameters[0].Value.ToString();

存储过程Categoriestest4

CREATE PROCEDURE Categoriestest4
@id int output,
@CategoryName nvarchar(15)
AS
insert into dbo.Categories
(CategoryName,[Description],[Picture])
values (@CategoryName,'test1',null)
set  @id = @@IDENTITY
GO

 

5. 同时具有返回值、输入参数、输出参数的存储过程

SqlConnection conn = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "Categoriestest5";
cmd.CommandType = CommandType.StoredProcedure;

// 创建参数
IDataParameter[] parameters =
{
new SqlParameter("@Id", SqlDbType.Int,4) ,
new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,
new SqlParameter("rval", SqlDbType.Int,4)
};

// 设置参数类型
parameters[0].Direction = ParameterDirection.Output;       // 设置为输出参数
parameters[1].Value = "testCategoryName";                  // 给输入参数赋值
parameters[2].Direction = ParameterDirection.ReturnValue;  // 设置为返回值

// 添加参数
cmd.Parameters.Add(parameters[0]);
cmd.Parameters.Add(parameters[1]);
cmd.Parameters.Add(parameters[2]);

conn.Open();
// 执行存储过程并返回影响的行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
conn.Close();
// 显示影响的行数，输出参数和返回值
Label1.Text += "-" + parameters[0].Value.ToString() + "-" + parameters[2].Value.ToString();

存储过程Categoriestest5

CREATE PROCEDURE Categoriestest5
@id int output,
@CategoryName nvarchar(15)
AS
insert into dbo.Categories
(CategoryName,[Description],[Picture])
values (@CategoryName,'test1',null)
set  @id = @@IDENTITY
return @@rowcount
GO

6. 同时返回参数和记录集的存储过程

SqlConnection conn = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "Categoriestest6";
cmd.CommandType = CommandType.StoredProcedure;

// 创建参数
IDataParameter[] parameters =
{
new SqlParameter("@Id", SqlDbType.Int,4) ,
new SqlParameter("@CategoryName", SqlDbType.NVarChar,15) ,
new SqlParameter("rval", SqlDbType.Int,4)                   // 返回值
};

// 设置参数类型
parameters[0].Direction = ParameterDirection.Output;        // 设置为输出参数
parameters[1].Value = "testCategoryName";                   // 给输入参数赋值
parameters[2].Direction = ParameterDirection.ReturnValue;   // 设置为返回值

// 添加参数
cmd.Parameters.Add(parameters[0]);
cmd.Parameters.Add(parameters[1]);
cmd.Parameters.Add(parameters[2]);

SqlDataAdapter dp = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
dp.Fill(ds);
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();

Label1.Text = string.Empty;
// 显示输出参数和返回值
Label1.Text += parameters[0].Value.ToString() + "-" + parameters[2].Value.ToString();

存储过程Categoriestest6

CREATE PROCEDURE Categoriestest6
@id int output,
@CategoryName nvarchar(15)
AS
insert into dbo.Categories
(CategoryName,[Description],[Picture])
values (@CategoryName,'test1',null)
set  @id = @@IDENTITY
select * from Categories
return @@rowcount
GO

 

7. 返回多个记录集的存储过程

SqlConnection conn = new SqlConnection(ConStr);
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "Categoriestest7";
cmd.CommandType = CommandType.StoredProcedure;

SqlDataAdapter dp = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
dp.Fill(ds);
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
GridView2.DataSource = ds.Tables[1];
GridView2.DataBind();

存储过程Categoriestest7

CREATE PROCEDURE Categoriestest7
AS
select * from Categories
select * from Categories
GO