Excel对象上的错误:对象引用未设置为对象的实例. [英] Error on Excel object: Object reference not set to an instance of an object.

问题描述

我在以下代码中收到此错误:

I''m getting this error:

Object reference not set to an instance of an object.

在以下行中:

if (isDone.get_Value(oMissing).ToString() == "1")

:

using xlNS = Microsoft.Office.Interop.Excel;

xlNS.Range isDone;
isDone = targetSheet.get_Range("AA23", "AA23");

if (isDone.get_Value(oMissing).ToString() == "1")
{
        //Do things
}

我的isDone原始值是:

My original value of isDone was:

isDone = targetSheet.get_Range("AA22", "AA22");

，但是我发现我正在覆盖AA22上的现有值，因此我将其转换为AA23.这个小小的变化导致了错误.我不知道为什么以及如何解决它...

but I found out that I was overwriting an existing value on AA22, so I turned it into AA23. this little change resulted in the error. I have no idea why and how to fix it...

推荐答案

我个人会尝试使用

I personally would try to use

if(targetSheet.Cells[22, 27].equals("1"))
{
//do things
}

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