我的if陈述出现问题 [英] Problems with my if statement

问题描述

大家好，谢谢您看我的问题.我有2条if语句:

Hi All, Thanks for looking at my question. I have 2 if statements:

if (recordset("IsLocked").VALUE != null)
        {
            if ((int)recordset("IsLocked").VALUE == 1)
            {
                Response.Redirect("../Lockout.aspx");
            }
        }

我收到错误消息无法将类型"System.DBNull"转换为"int""
任何建议或意见将不胜感激.
谢谢
D

I am getting the error "Cannot convert type ''System.DBNull'' to ''int''"
Any suggestions or input would be greatly appreciated.
Thank-you,
D

推荐答案

解决方案是在尝试进行转换之前对值进行null检验.

The solution is to do an is null check on the value before attempting a conversion.

if( recordset("IsLocked") != DBNull.Value && (int)recordset("IsLocked").VALUE == 1) ...

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