The StringBuilder class manages a buffer of characters without turning them into a string so it can perform operations such as appending text more quickly than. NET Framework is optimized to make creating and destroying lots of strings reasonably fast but it still takes more time than it would if strings were implemented as simple arrays of characters. It starts with an empty string and adds the 10 letters one at a time, creating a new string each time. In this example if num_letters is 10, then this code actually creates 11 strings.
NET destroys the old string and creates a new one. Your code may look like it modifies a string but internally. That means you can never modify a string. It may look like this code creates a single string but actually as it builds its result it creates a whole bunch of strings. ' Pick a random number between 0 and 25 ' to select a letter from the letters array.ĭim letter_num As Integer = rand.Next(0, _ NET uses code similar to the following to generate a random string of letters. The example Generate random strings in Visual Basic. Strings, variables, StringBuilder, concatenate, catenate
This example shows how to use the StringBuilder class to concatenate strings quickly in Visual Basic.
Use the StringBuilder class to concatenate strings quickly in Visual Basic. VB Helper: HowTo: Use the StringBuilder class to concatenate strings quickly in Visual Basic.