How do I create a string dynamically in C#?

Question

I am developing an application for managing Personal Hotspot of a Laptop (Windows of Course). I'm having a little difficulty in changing the Hotspot Name. Here is my Code:

//For CMD Command
System.Diagnostics.Process process = new System.Diagnostics.Process();
System.Diagnostics.ProcessStartInfo startInfo = new 
System.Diagnostics.ProcessStartInfo();
startInfo.UseShellExecute = false;
startInfo.RedirectStandardOutput = true;
startInfo.FileName = "CMD.exe";
startInfo.CreateNoWindow = true;

//Reading User Input in textBox1:
string name = textBox1.Text;

//CMD Argument:..., Which is currently written wrong to make it Easy to 
//understand the problem

startInfo.Arguments = "/C netsh wlan set hostednetwork ssid="name";
process.StartInfo = startInfo;
process.Start();

Here, In the Arguments line, the syntax is wrong. The value assigned to Arguments should be a single string. I need to incorporate name, that has a dynamic value, with the rest of the string that is constant. How do I do that?

Zohar Peled · Accepted Answer · 2017-11-09 05:21:09Z

4

Unless I'm missing something here, seems to me that a simple string concatenation would do it:

startInfo.Arguments = "/C netsh wlan set hostednetwork ssid=" + name;

answered Nov 9, 2017 at 5:21

Zohar Peled

82.9k11 gold badges79 silver badges134 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Zohar Peled Over a year ago

but then again, I only had 2 hours of sleep, so it's totally possible I'm missing something...

Zohar Peled Over a year ago

Glad to help :-)

Nik · Accepted Answer · 2017-11-11 01:42:28Z

2

There are several ways you can create a dynamic string:

For your specific case, Concatenation is the best choice as your string is very simple.The reason you would choose this method for your case is because it is very light as compared to other methods and has a clean enough syntax.

startInfo.Arguments = "/C netsh wlan set hostednetwork ssid=" + name;

For anything more complicated, string.Format is a popular go to. You would generally use it to combine more complex strings than your example. This tutorial covers the subject thoroughly.

startInfo.Arguments = string.Format("/C netsh wlan set hostednetwork ssid={0}", name);

The release of C#6.0 included a neat feature: interpolated strings. It is for the most part just syntactic sugar for string.Format, where the line below is turned into the line above at compile time. There are subtle differences, but those are not important in this thread.

startInfo.Arguments = $"/C netsh wlan set hostednetwork ssid={name}";

And lastly, if you need to change a string more than a few times (I usually use the rule of 5 - i.e. a string changes more than 5 times), I would use the StringBuilder class. A great application, among many others, would be a long loop that modifies a certain string each iteration. See This Tutorial. In this case, the Garbage Collector will thank you for a using a StringBuilder!

edited Nov 11, 2017 at 1:42

answered Nov 9, 2017 at 5:30

Nik

1,8701 gold badge18 silver badges24 bronze badges

2 Comments

Dmitrii Bychenko Over a year ago

String interpolation is even more readable: startInfo.Arguments = $"/C netsh wlan set hostednetwork ssid={name}";

Zohar Peled Over a year ago

Format and interpolated strings are better for code readability, but concatenation is the best option in terms of performance when combining a small number of strings, string builder is better when you have a lot of strings.

Collectives™ on Stack Overflow

How do I create a string dynamically in C#?

2 Answers 2

2 Comments

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related