How can I cast FString to Char *?

Development Programming & Scripting
1

I’ve seen several casting answers but none of them are working. I thing I have something that compiles but I am unsure if it is the correct way:

int ARPG_Database::BP_GetColumnIndex(int resultSet, FString columnName)
{
	return GetColumnIndex(resultSet, (char *)&columnName.GetCharArray());
}

int ARPG_Database::GetColumnIndex(int iResult, const char* columnName)
{
2

You probably want this:

int ARPG_Database::BP_GetColumnIndex(int resultSet, FString columnName)
{
    return GetColumnIndex(resultSet, TCHAR_TO_ANSI(*columnName));
}
 
int ARPG_Database::GetColumnIndex(int iResult, const char* columnName)
{

FString uses TCHAR internally, so this would be how we’d typically a write function taking a string pointer in UE4:

int ARPG_Database::BP_GetColumnIndex(int resultSet, FString columnName)
{
    return GetColumnIndex(resultSet, *columnName);
}
 
int ARPG_Database::GetColumnIndex(int iResult, const TCHAR* columnName)
{
3

Thanks for the clarification sir.

4

I tried to top answer but I’m getting:

ISO C++11 does not allow conversion from string literal to ‘char *’

The function (not mine) parameter is * char (not const), but I am confident the contents are not changed in the function call.

5

Nevermind. It turned out to be another parameter in the function that was generating the error. Using the above solution fixed the original problem and exposed another.

6

I wrote a class to help with this, http://blogs.winterleafentertainment.com/post/2015/05/05/string-casting-fun-in-unreal-engine-4

Should cover your problem.

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