How to use '%' symbols in string builder (VB .NET)

Question

1.00/5 (4 votes)

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VB

ASP.NET

strBd.Append("<%ShowFiles()%>") it's not working for me

What I have tried:

I tired (') and (&) but not working

Posted 2-Nov-16 2:22am

Sunny Gajjar

Updated 2-Nov-16 2:59am

DaveAuld

v3

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phil.o 2-Nov-16 8:40am

Can you define 'not working'? What do you expect? What do you actually get?

2 solutions

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OriginalGriff · Answer 1 · 2016-11-02T02:59:00

Solution 2

It does exactly what I expected:

VB.NET

Dim strBd As New StringBuilder
strBd.Append("Start: ")
strBd.Append("<%ShowFiles()%>")
strBd.Append(" :End")
Console.WriteLine(strBd.ToString())

Gives me:

Start: <%ShowFiles()%> :End

It's a string: when you append otehr strings, it adds them into the string so far.
If that isn't what you wanted it to do, you need to either rethink what you are trying to do, or explain in much better detail exactly what you do expect it to do.

Posted 2-Nov-16 2:59am

OriginalGriff

Comments

[no name] 2-Nov-16 9:09am

I guess he wants the return value of a Function, probably by using the same technique as the Environ variables or the $ prefix. Am not sure if this is possible in this case.

OriginalGriff 2-Nov-16 9:15am

Yeah, it's difficult to tell - it may well be that he's trying to pass it to his Client as Javascript to get it to call the function on his server...in which case he needs to think about what he's doing rather more! :laugh

Sunny Gajjar 2-Nov-16 9:18am

Thanks for your replay but I sorted the think by other way and its working

User 11061201 · Answer 2 · 2016-11-02T02:58:00

Solution 1

If you are trying to append the return value of a Function then do the following;

VB

sb.Append("<%" & ShowFiles().ToString() & "%>")
'or
sb.AppendFormat("<%{0}%>", {ShowFiles().ToString()}) 'where 0 is the index of the parameter array

Posted 2-Nov-16 2:58am

User 11061201

Updated 2-Nov-16 8:31am

v2

Comments

Richard Deeming 2-Nov-16 11:08am

There's a typo in your AppendFormat example. It should be:

sb.AppendFormat("<%{0}%>", ShowFiles())

* You need curly braces within the format string, not parentheses;
* You don't need to wrap the other arguments in curly braces;
* You don't need to call ToString on the result of the method, and doing so might cause a NullReferenceException;