[英]Unable to execute MySql stored procedure from c#
在MySql中:
DELIMITER //
DROP PROCEDURE IF EXISTS `testdb`.`Check_UserId_Sproc` //
CREATE PROCEDURE `testdb`.`Check_UserId_Sproc` (IN User_Id NVARCHAR(100))
BEGIN
select count(*) from demo_user where userid = User_Id;
END //
DELIMITER ;
在C#中:
public DataTable ExecuteParameterizedSelectCommand(string CommandName, CommandType cmdType,MySqlParameter[] param)
{
DataTable table = new DataTable();
string CS = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using(MySqlConnection con = new MySqlConnection(CS))
{
using (MySqlCommand cmd = con.CreateCommand())
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = CommandName;
cmd.Parameters.AddRange(param);
try
{
if (con.State != ConnectionState.Open)
{
con.Open();
}
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
da.Fill(table);
}
}
catch
{
throw;
}
return table;
}
}
}
public DataTable checkExistingUserId()
{
MySqlDBHelper oHelper = new MySqlDBHelper();
MySqlParameter[] parameters = new MySqlParameter[]
{
new MySqlParameter("User_Id", 'DemoId')
};
return oHelper.ExecuteParameterizedSelectCommand("Check_UserId_Sproc", CommandType.StoredProcedure, parameters);
}
当我尝试执行checkExistingUserId()时 ,出现以下异常:
Incorrect number of arguments for PROCEDURE testdb.Check_UserId_Sproc; expected 1, got 0
可能是我犯了一个愚蠢的错误,但我无法弄清楚。 我是mysql的新手,正在尝试解决它。
当我调试时,数组包含如下图所示的参数,但SP不会收集该参数。
提前致谢
在您的代码中:
cmd.CommandType = CommandType.Text;
应该
cmd.CommandType = cmdType;
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