C# 没有为一个或多个必需参数给出值

Question

SQL语法有什么错误吗？

Sql 语法：

UPDATE Table1 SET 
       Username='Diana' , 
       Email='Diana@gmail.com' , 
       FirstName='' , 
        LastName='' , 
       CrediCardNum='' 
Where Username='Diana'

它一直给我错误：

No value given for one or more required parameters.

我尝试重新启动 visual studio 但一直出现相同的错误

c#代码

                f1.Connection1.Open();
            OleDbCommand Command = new OleDbCommand();
            Command.Connection = f1.Connection1;
            if(m[6].Contains("Red"))
            Command.CommandText = "UPDATE userdlt SET Username='"+textBox10.Text+"' , Email='"+textBox9.Text+"' , FirstName='"+textBox8.Text+ "',LastName='"+textBox7.Text+"',CrediCardNum='"+textBox6.Text+"' Where Username='"+m[0]+"'" ;
            else
                Command.CommandText = "UPDATE Table1 SET Username='"+textBox10.Text+"' , Email='"+textBox9.Text+"' , FirstName='"+textBox8.Text+ "' , LastName='"+textBox7.Text+"' , CrediCardNum='"+textBox6.Text+"' Where Username='"+m[0]+"'" ;
            Clipboard.SetText(Command.CommandText);
            Command.ExecuteNonQuery();
            f1.Connection1.Close();
            MessageBox.Show("Member UPDATED Succefully");

m数组是字符串数组

Answer 1

我怀疑电子邮件地址中的“@”使 SqlCommand 认为您正在传递参数。避免这种情况的方法如下：

字符串sql = "UPDATE myTable SET col1 = @val1, col2=@val2 WHERE col3 = @val3";

然后，一旦你用这个SQL创建了命令对象：

myCommand.Parameters.AddWithValue("val1", "anEmail@address.com");

等等。

Answer 2

您的栏目名称 creditcardNum 缺失 t

  Command.CommandText = "UPDATE Table1 SET Username='"+textBox10.Text+"' ,
 Email='"+textBox9.Text+"' , FirstName='"+textBox8.Text+ "' ,
LastName='"+textBox7.Text+"' , CrediCardNum='"+textBox6.Text+"' Where 
Username='"+m[0]+"'" ;

应该是

 Command.CommandText = "UPDATE Table1 SET Username='"+textBox10.Text+"' ,
     Email='"+textBox9.Text+"' , FirstName='"+textBox8.Text+ "' ,
    LastName='"+textBox7.Text+"' , CreditCardNum='"+textBox6.Text+"' Where 
    Username='"+m[0]+"'" ;

你的table定义图片说CreditCardNum

C# 没有为一个或多个必需参数给出值

C# No value given for one or more required parameters

c#

sql

syntax

ms-access-2007

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