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.net调用存储过程详解
连接字符串
string conn = ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString;
confige文件
<connectionStrings>
<add name="NorthwindConnectionString" connectionString="Data Source=.;Initial Catalog=Northwind;Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
1. 只返回单一记录集的存储过程
SqlConnection sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand(); // 设置sql连接 cmd.Connection = sqlconn; // 如果执行语句 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(); // 填充dataset dp.Fill(ds); // 以下是显示效果 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 sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = sqlconn;
cmd.CommandText = "Categoriestest2";
cmd.CommandType = CommandType.StoredProcedure;
sqlconn.Open();
// 执行并显示影响行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
sqlconn.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 sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = sqlconn;
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]);
sqlconn.Open();
// 执行存储过程并返回影响的行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
sqlconn.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 sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = sqlconn;
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]);
sqlconn.Open();
// 执行存储过程并返回影响的行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
sqlconn.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 sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = sqlconn;
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]);
sqlconn.Open();
// 执行存储过程并返回影响的行数
Label1.Text = cmd.ExecuteNonQuery().ToString();
sqlconn.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 sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = sqlconn;
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();
// 填充dataset
dp.Fill(ds);
// 显示结果集
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
Label1.Text = "";
// 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 sqlconn = new SqlConnection(conn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = sqlconn;
cmd.CommandText = "Categoriestest7";
cmd.CommandType = CommandType.StoredProcedure;
SqlDataAdapter dp = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
// 填充dataset
dp.Fill(ds);
// 显示结果集1
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
// 显示结果集2
GridView2.DataSource = ds.Tables[1];
GridView2.DataBind();
存储过程Categoriestest7
CREATE PROCEDURE Categoriestest7
AS
select * from Categories
select * from Categories
GO