When you create static methods in your form code, the source code looks like this
public int imageNum=0;
。。。。。。
public static int button1_clicknum()
{
return imageNum;
}This is followed by an error such as the following. The error is caused by the fact that the static method cannot directly access the non-static member, and the non-static field needs to be referenced, which can be a private member of an instance. To correct this, change imagenum to a static member.
Public static int imageNum = 0;
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