如何使用 ADO.NET 和 Visual C# .NET 调用带参数的存储过程

[code]Create Procedure TestProcedure(  @au_idIN varchar (11),  @numTitlesOUT Integer OUTPUT)AS select A.au_fname, A.au_lname, T.title from authors as A join titleauthor as TA onA.au_id=TA.au_idjoin titles as Ton T.title_id=TA.title_idwhere A.au_id=@au_idINset @numTitlesOUT = @@Rowcount

[code]using System.Data.SqlClient;

[code]using System.Data.OleDb;

[code]SqlConnection PubsConn = new SqlConnection ("Data Source=server;integrated " + "Security=sspi;initial catalog=pubs;");

SqlCommand testCMD = new SqlCommand ("TestProcedure", PubsConn);

testCMD.CommandType = CommandType.StoredProcedure;

SqlParameter IdIn = testCMD.Parameters.Add   ("@au_idIN", SqlDbType.VarChar, 11);

IdIn.Direction = ParameterDirection.Input;

SqlParameter NumTitles = testCMD.Parameters.Add("@numtitlesout", SqlDbType.VarChar, 11);

NumTitles.Direction = ParameterDirection.Output ;

IdIn.Value = "213-46-8915";

PubsConn.Open();

VS.NET里++++++++++++++++++++++++++++++++++++++++++++++

SqlDataReader myReader = testCMD.ExecuteReader();

Console.WriteLine ("Book Titles for this Author:");

while (myReader.Read())

{     Console.WriteLine ("{0}", myReader.GetString (2));   };

myReader.Close() ;

Console.WriteLine("Number of Rows: " + NumTitles.Value );

Console.WriteLine("Return Value: " + RetVal.Value);

+++++++++++++++++++++++++++++++++++++++++++++++

=ASP.NET里

+++++++++++++++++++++++++++++++++++++++++++++++++

testCMD.ExecuteNonQuery();

mylabel.Text="返回值为"+NumTitles.Value.ToString();

PubsConn.Close();

+++++++++++++++++++++++++++++++++++++++++++++

使用 Command 对象的 ExecuteNonQuery 方法
loadTOCNode(2, 'summary');此示例使用 ExecuteNonQuery 方法运行查询并返回参数值。ExecuteNonQuery 还返回在运行此查询后受影响的记录数。但是，ExecuteNonQuery 不从该存储过程返回任何行或列。

如果只需要知道更改的行数，那么在使用 INSERT、UPDATE 或 DELETE 语句时，ExecuteNonQuery 方法特别有用。当存储过程中仅使用 SELECT 语句时，您将收到 -1，因为查询不会影响任何行。 
1.
在运行 SQL Server 的计算机上创建下面的存储过程：
Create Procedure TestProcedure3(  @au_idIN varchar (11),  @au_fnam varchar (30))As/* set nocount on */ Update authors set au_fname = @au_fnamwhere au_id = @au_idin	return (5)

2.
新建一个新的 Visual C# .NET Windows 应用程序项目。
3.
对 System 和 System.Data 命名空间使用 using 语句，这样，在后面的代码中就无需限定这些命名空间中的声明了。将此代码添加到“窗体”代码模块的顶部。请确保只复制对应于您所选的提供程序的代码。SQL 客户端
[code]using System.Data.SqlClient;

[/code]OLE DB 数据提供程序
[code]using System.Data.OleDb;

[/code]
4.
用以下代码替换 Form1 代码模块中 private Form1_Load 事件后面的代码：SQL 客户端
[code]string strRowAffect;

SqlConnection PubsConn = new SqlConnection    ("Data Source=server;integrated Security=sspi;" +    "initial catalog=pubs;");

SqlCommand testCMD = new SqlCommand    ("TestProcedure3", PubsConn);

testCMD.CommandType = CommandType.StoredProcedure;

SqlParameter RetVal = testCMD.Parameters.Add    ("RetVal", SqlDbType.Int);

RetVal.Direction = ParameterDirection.ReturnValue;

SqlParameter IdIn = testCMD.Parameters.Add    ("@au_idIN", SqlDbType.VarChar, 11);

IdIn.Direction = ParameterDirection.Input;

SqlParameter FnameIn = testCMD.Parameters.Add    ("@au_fnam", SqlDbType.VarChar, 30);

FnameIn.Direction = ParameterDirection.Input;IdIn.Value = "213-46-8915";

FnameIn.Value = "Marjorie";

PubsConn.Open();

strRowAffect =testCMD.ExecuteNonQuery ().ToString() ;

Console.WriteLine("Number of Rows: " + strRowAffect );

Console.WriteLine("Return Value: " + RetVal.Value);

[/code]OLE DB 数据提供程序
[code]int intRowAffected;OleDbConnection PubsConn = new OleDbConnection    ("Provider=SQLOLEDB;Data Source=server;" +    "integrated Security=sspi;initial catalog=pubs;");OleDbCommand testCMD = new OleDbCommand    ("TestProcedure3", PubsConn);testCMD.CommandType = CommandType.StoredProcedure;OleDbParameter RetVal = testCMD.Parameters.Add    ("RetVal", OleDbType.Integer);RetVal.Direction = ParameterDirection.ReturnValue;OleDbParameter IdIn = testCMD.Parameters.Add    ("@au_idIN", OleDbType.VarChar, 11);IdIn.Direction = ParameterDirection.Input;OleDbParameter FnameIn = testCMD.Parameters.Add   ("@au_fname", OleDbType.VarChar, 30);FnameIn.Direction = ParameterDirection.Input;IdIn.Value = "213-46-8915";FnameIn.Value = "Marjorie";PubsConn.Open();intRowAffected = testCMD.ExecuteNonQuery();Console.WriteLine("Number of Rows affected: " + intRowAffected);Console.WriteLine(RetVal.Value);

[/code]
5.
修改 Connection 对象的连接字符串，以便指向运行 SQL Server 的计算机。
6.
运行上述代码。“输出”窗口显示受影响的行数 (intRowAffect) 和返回参数的值。
[/code]

[code]Create Procedure TestProcedure2(  @au_idIN varchar (11))As/* set nocount on */ select count (T.title) from authors as A join titleauthor as TA onA.au_id=TA.au_idjoin titles as Ton T.title_id=TA.title_idwhere A.au_id=@au_idINReturn(5)

[code]using System.Data.SqlClient;

[code]using System.Data.OleDb;

[code]string strCount;SqlConnection PubsConn = new SqlConnection    ("Data Source=server;integrated " +    "Security=sspi;initial catalog=pubs;");SqlCommand testCMD = new SqlCommand    ("TestProcedure2", PubsConn);testCMD.CommandType = CommandType.StoredProcedure;SqlParameter RetVal = testCMD.Parameters.Add    ("RetVal", SqlDbType.Int);RetVal.Direction = ParameterDirection.ReturnValue;SqlParameter IdIn = testCMD.Parameters.Add    ("@au_idIN", SqlDbType.VarChar, 11);IdIn.Direction = ParameterDirection.Input;       IdIn.Value = "213-46-8915";PubsConn.Open();strCount =testCMD.ExecuteScalar ().ToString() ;Console.WriteLine("Number of Rows: " + strCount );Console.WriteLine("Return Value: " + RetVal.Value);

[code]string strCount;

OleDbConnection PubsConn = new OleDbConnection    ("Provider=SQLOLEDB;Data Source=server;" +    "integrated Security=sspi;

initial catalog=pubs;");

OleDbCommand testCMD = new OleDbCommand    ("TestProcedure2", PubsConn);

testCMD.CommandType = CommandType.StoredProcedure;

OleDbParameter RetVal = testCMD.Parameters.Add    ("RetVal", OleDbType.Integer);

RetVal.Direction = ParameterDirection.ReturnValue;

OleDbParameter IdIn = testCMD.Parameters.Add    ("@au_idIN", OleDbType.VarChar, 11);

IdIn.Direction = ParameterDirection.Input;IdIn.Value = "213-46-8915";

PubsConn.Open();strCount = testCMD.ExecuteScalar().ToString() ;

Console.WriteLine("Number of Rows: " + strCount);

Console.WriteLine("Return Value: " + RetVal.Value);