I've tried this:
richTextBoxResults.Text = listStrSessionIdLines.ToString();
...but get the List's ToString() representation (I guess that's what it is: "System.Collections.Generic.List`1[System.String]").
...and I've tried to try this:
listStrSessionIdLines.CopyTo(richTextBoxResults.Lines);
...but I get, "Argument Exception was unhandled. Destination array was not long enough. Check destIndex and length, and the array's lower bounds."
Does this mean I have to assign the RichTextBox a number of lines first, or...???
This works for me:
myRichTextBox.Lines = myList.ToArray();
Most classes in the BCL have a ToString() method.
When it comes to a List Of strSessionIdLines
the ToString() tells you what type of object it is.
If you are casting for example an int
to a string
the int.ToString()
will return its value, but if you do it on a array of integers int[].ToString
it's ToString()
method wont return eg a comma/linefeed separated string of values. As it appeared you expected.
This is why assigning the .ToArray to the .Lines property of the RichTextBox or a loop (or aggregate) to concatenate the List Of String into one string to suit the .Text property of the RichTextBox works.
One more tip I live by is when I need to call a method, eg String.Format
I hover my mouse so that I can see what the method expects - expectsbeing the keyword
. Then say the method wants a argument in the parameter thats of Type X, I declare type X and pass it in. Methods often have overloads, meaning that they can work with different parameters, so pressing up/down to scroll through them is also helpful in working out what is the most convenient in your situation. When you are passing in arguments to a method (in its parameter) type comma to refresh the tooltip indicating each arguments datatype.
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