C# 将字符串参数发送到存储过程
我正在从事连接SQL数据库MySQL 2008的asp.net C项目。以下是我的C类:C# 将字符串参数发送到存储过程,c#,sql,stored-procedures,C#,Sql,Stored Procedures,我正在从事连接SQL数据库MySQL 2008的asp.net C项目。以下是我的C类: public static DataTable GetUnitByName(string unit) { Database db = DatabaseFactory.CreateDatabase(); string sqlCommand = "GetUnitByName"; DbCommand dbCommandWrapper = db.GetSto
public static DataTable GetUnitByName(string unit)
{
Database db = DatabaseFactory.CreateDatabase();
string sqlCommand = "GetUnitByName";
DbCommand dbCommandWrapper = db.GetStoredProcCommand(sqlCommand);
db.AddInParameter(dbCommandWrapper, "@Unit", DbType.String, unit);
DataSet ds = db.ExecuteDataSet(dbCommandWrapper);
DataTable dt = ds.Tables[0];
return dt;
}
下面是存储过程:
alter PROCEDURE [dbo].[GetUnitByName]
(
@Unit nvarchar
)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON
DECLARE @Err int
-- Insert statements for procedure here
select * from Unit where Name=@Unit
SET @Err = @@Error
RETURN @Err
END
我这样称呼这个过程:
DataTable unit1=Unit.GetUnitByNameper100gText[1]在此处输入代码,wich per10gText是一个字符串列表。
但它返回空数据表。与sql server的连接,在调试过程中,我看到该过程无法读取参数。
请提供任何帮助。如果希望proc返回参数,则需要首先将其声明为输出参数
alter PROCEDURE [dbo].[GetUnitByName]
(
@Unit nvarchar , @err int output
)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON
-- Insert statements for procedure here
select * from Unit where Name=@Unit
SET @Err = @@Error
RETURN @Err
END
我不经常使用sql代码,您能详细解释一下这个函数吗?要直接使用sql和C返回值?我不知道C-:请阅读以下有关proc和func的内容: