Help running a function

Question

1.00/5 (1 vote)

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Hi,

I am new to C# so I don't really know what I am doing.

I am having trouble running a function/method in C# and wonder if anyone can help me. I want to resize a simple image loaded in from openFileDialog. All I want to do is run a function how do I do that?

At the moment I have got:

private void btnConvert_Click(object sender, EventArgs e)
     {
         Image MyImg = Image.FromFile(openedFile);
         Image MyImg2 = Image.FromFile(openedFile);
         ResizeImage(MyImg, MyImg2, 523, 523, false);

     }

C#

public void ResizeImage(string OriginalFile, string NewFile, int NewWidth, int MaxHeight, bool OnlyResizeIfWider)
        {
//Code to execute
}

But for some reason I keep getting an error with the line:

ResizeImage(MyImg, MyImg2, 523, 523, false);

Which is to run the function/method. It comes up with the error "The best overload method match for 'form1.ResizeImage(String, String, Int, Int, Bool)' has some invalid arguments.

Posted 25-Jul-11 1:24am

Willtwinny

Updated 25-Jul-11 1:27am

#realJSOP

v2

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3 solutions

Solution 2

Your method signature is asking for 5 parameters the first 2 of which should be in the form of strings (presumably the path tot he old and new file). However, when you call it in btnConvert_Click you are passing Image objects as the first 2 parameters when, in fact, you should be passing the path as a string.

Posted 25-Jul-11 1:28am

R. Giskard Reventlov

Solution 3

You can always check what are you receiving in MyImg, MyImg2 by debugging and by judging your error message: in this line

ResizeImage(MyImg, MyImg2, 523, 523, false); make sure

MyImg, and MyImg2 are of string type.

hope it helps :)

for further queries comment here!!

Posted 25-Jul-11 1:35am

Uday P.Singh

Updated 25-Jul-11 1:36am

v2

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#realJSOP · Accepted Answer · 2011-07-25T01:26:00

Solution 1

That usually means that one of your parameters is of the wrong type. It looks like MyImg and MyImg2 are Image types, and your method is expecting them to be a string.

Posted 25-Jul-11 1:26am

#realJSOP

Updated 25-Jul-11 1:27am

v3

Comments

Willtwinny 25-Jul-11 7:38am

I can't believe I am so stupid.
Thank-You, I kept thinking that it was returning a string (OpenFileDialog), when infact like you said I inserting it into a picture and then trying to pass that off as a string, instead of just passing it off as a string anyway.

Thank-You.