Question

最近我发现了一个错误，但无法修复，甚至试图更改参数，但没有任何帮助。这是我面临的错误，

    ************** Exception Text **************
System.ArgumentException: Parameter '_IDFID' not found in the collection.
   at MySql.Data.MySqlClient.MySqlParameterCollection.GetParameterFlexible(String parameterName, Boolean throwOnNotFound)
   at MySql.Data.MySqlClient.StoredProcedure.GetAndFixParameter(String spName, MySqlSchemaRow param, Boolean realAsFloat, MySqlParameter returnParameter)
   at MySql.Data.MySqlClient.StoredProcedure.CheckParameters(String spName)
   at MySql.Data.MySqlClient.StoredProcedure.Resolve(Boolean preparing)
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)
   at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery()
   at Testme.Form3.button1_Click(Object sender, EventArgs e) in C:\Users\Modather\source\repos\Testme\Testme\Form3.cs:line 35
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

我真的不知道问题出在哪里，但这是我的MySQL保存过程

CREATE DEFINER=`sql7258326`@`%` PROCEDURE `MemberEditORAdd`(
_IDFID int,
MemberName varchar(45),
MemberRank varchar(45),
MemberWarn varchar(45),
MemberJoinDate varchar(45)
)
BEGIN
        IF IDFID = 0 THEN
            INSERT INTO KODCP (IDFID,MEMBRNAME,MEMBRRANK,MEMBRWARN,MJOINDATE)
            VALUES (_IDFID,MemberName,MemberRank,MemberWarn,MemberJoinDate);

        ELSE
            UPDATE KODCP
            SET
                MEMBRNAME = MemberName,
                MEMBRRANK = MemberRank,
                MEMBRWARN = MemberWarn,
                MJOINDATE = MemberJoinDate
            WHERE IDFNUB = _IDFID;
        END IF;

END

在VB中编写的调用上述代码的代码是

private void button1_Click(object sender, EventArgs e)
        {
            using (MySqlConnection mysqlCon = new MySqlConnection(connectionString))
            {
                mysqlCon.Open();
                MySqlCommand mysqlCmd = new MySqlCommand("MemberEditORAdd",mysqlCon);
                mysqlCmd.CommandType = CommandType.StoredProcedure;
                mysqlCmd.Parameters.AddWithValue("IDFID", IDFID);
                mysqlCmd.Parameters.AddWithValue("MEMBRNAME", MemberName.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MEMBRRANK", MemberRank.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MEMBRWARN", MemberWarn.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MJOINDATE", MemberJoinDate.Text.Trim());
                mysqlCmd.ExecuteNonQuery();
                MessageBox.Show("Operation Done!");
            }
        }

感谢您的关注，希望您能帮助我修复它，感谢您为我提供帮助<3

Answer 1

CREATE DEFINER='sql7258326'@'%' PROCEDURE 'MemberEditORAdd'( _IDFID int,***

您已经按照上面的步骤创建了过程，但是您正在尝试按以下步骤使用它

mysqlCmd.Parameters.AddWithValue("IDFID", IDFID);

您需要使用正确的变量名来更改对方法的调用，如mysqlCmd.Parameters.AddWithValue("_IDFID", IDFID);

此行也没有名为IDFID的Procedure参数

IF IDFID = 0 THEN

对数据库运行以下代码：

    IF IDFID = 0 THEN
        INSERT INTO KODCP (IDFID,MEMBRNAME,MEMBRRANK,MEMBRWARN,MJOINDATE)
        VALUES (_IDFID,MemberName,MemberRank,MemberWarn,MemberJoinDate);

    ELSE
        UPDATE KODCP
        SET
            MEMBRNAME = MemberName,
            MEMBRRANK = MemberRank,
            MEMBRWARN = MemberWarn,
            MJOINDATE = MemberJoinDate
        WHERE IDFNUB = _IDFID;
    END IF;

END

上面写着INSERT INTO KODCP (IDFID, MEMBRNAME, MEMBRRANK, MEMBRWARN, MJOINDATE)，表示将值插入到名为IDFID, MEMBRNAME, MEMBRRANK, MEMBRWARN, MJOINDATE的表中名为KODCP的列中

它还说要从下面的变量列表中分别提供这些参数的值

_IDFID, MemberName, MemberRank, MemberWarn, MemberJoinDate

这意味着粘贴到过程中的变量必须为_IDFID, MemberName, MemberRank, MemberWarn, MemberJoinDate

此代码：

using (MySqlConnection mysqlCon = new MySqlConnection(connectionString))
            {
                mysqlCon.Open();
                MySqlCommand mysqlCmd = new MySqlCommand("MemberEditORAdd",mysqlCon);
                mysqlCmd.CommandType = CommandType.StoredProcedure;
                mysqlCmd.Parameters.AddWithValue("IDFID", IDFID);
                mysqlCmd.Parameters.AddWithValue("MEMBRNAME", MemberName.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MEMBRRANK", MemberRank.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MEMBRWARN", MemberWarn.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MJOINDATE", MemberJoinDate.Text.Trim());
                mysqlCmd.ExecuteNonQuery();
                MessageBox.Show("Operation Done!");
            }

应替换为以下代码：

using (MySqlConnection mysqlCon = new MySqlConnection(connectionString))
            {
                mysqlCon.Open();
                MySqlCommand mysqlCmd = new MySqlCommand("MemberEditORAdd",mysqlCon);
                mysqlCmd.CommandType = CommandType.StoredProcedure;
                mysqlCmd.Parameters.AddWithValue("_IDFID", IDFID);
                mysqlCmd.Parameters.AddWithValue("MemberName", MemberName.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MemberRank", MemberRank.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MemberWarn", MemberWarn.Text.Trim());
                mysqlCmd.Parameters.AddWithValue("MemberJoinDate", MemberJoinDate.Text.Trim());
                mysqlCmd.ExecuteNonQuery();
                MessageBox.Show("Operation Done!");
            }

您的支票必须更改为

IF _IDFID = 0 THEN

在集合（C＃+ MySQL）中找不到参数“ _IDFID”

1 个答案: