Error When Passing Parameters across Multiple Forms in C#

Hee Lian

I am trying to pass a parameter across from Form 1(POS form) to Form 2(Summary Form) but when I declare the variables in Form 2(Summary Form), two errors pop up saying that "There is no argument given that corresponds to the required formal parameter" in Form 3(Inventory form) and Form 4(Main form).

How do I solve these errors?

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sachin Singh5y ago
This error comes due to the absence of default constructor , if you are using anytype of inheritence then make sure your base should have a default constructor.
public class BaseClass
{
int id;
public BaseClass(int i)
{
id = i;
}
public void baseClassMethod()
{

}
}
public class childClass : BaseClass
{
int id2;
public childClass(int i)
{
id2 = i;
}
public void childClassMethod()
{

}
}

The above code will produce the same error as yours .To solve this error we simply create a default constructor in base class
public class BaseClass
{
    int id;
    public BaseClass(int i)
    {
        id = i;
    }
    public BaseClass()
    {
    }
    public void baseClassMethod()
    {
     }
}
Rijwan Ansari5y ago
If you have defined parameters in Form 2(Summary Form) on form creation then you must initialize form2 with parameters in it.
Example: if your form2 defined as
public string functionName(string a, string b)
{
//summary form
    /// code
}
Then while calling from another forms, you have to pass parameters value.
public Form1()
   {
       InitializeComponent();
       _form2 = new Form2();

        _form2.funtionName(a,b) //value of a and b in param
   }
However, this error is related with parameters are not passed into the functon/forms. If possible share your related code or code at error position.
Let me know if understood your question.
Amit Gupta5y ago
Having limited description about your issue, how one can understand the root cause.

Anyway, if you are looking for passing data from one form to another, no matter the form is open or close then you can look at the below link

It is a very basic question, a long time ago, I had created a demo to update the second form having events (see attachment project from the below link)

https://www.c-sharpcorner.com/forums/pass-value-from-one-form-to-another-form-and-refresh