C#'s version of VB6's instr() 1

[notrut]

Hi, I'm new to C# and I have a couple of questions about the Streamreader.

I would like to read info from a text file and store some, not all of the information into variables.

For example:

In a file, there is a line that has 'customername=Joe Blow'. I want to find this line and pull out the name.

How would I do this??

Before, I would read the line from the file, if it had customername in it, I would get the name.

Any help would be greatly appreciated.

 

[JohnYingling]

See string.IndexOf. It is not C# specific, it is .Net Framework. The main difference is that it is 0-Basesd rather than 1-based i.e. it returns -1 for a "no find"

i = sData.IndexOf("Customer=")
if (I >= 0)

It is Case Sensitive.

http://www.VBResizer.com

Forms/Controls Resizing/Tabbing

http://www.VBCompare.com

Compare Code

http://www.VBSortGen.com

Generate Sort Class in VB

http://www.Vbcompare.com/Check.Htm(1979

Check To MS)

 

[crazyboybert]

You can use IndexOf in place of instr like this

string s = "customername=Joe Blow";
string name;
if(s.IndexOf("customername") > -1) name = s.Substring(s.IndexOf("=")+1);

Rob

Every gun that is made, every warship launched, every rocket fired, signifies in the final sense a theft from those who hunger and are not fed, those who are cold and are not clothed - Eisenhower 1953

 

[obislavu]

For this kind of search you should use regular expressions which are more flexible. For your scenario:

string line=" bla  bla bla bla customername=Joe Blow";
string name="";
System.Text.RegularExpressions.Regex reg = new System.Text.RegularExpressions.Regex("(.*)customername=(.*)");
System.Text.RegularExpressions.Match m = reg.Match(line);
if (m !=null && m.Success)
{
         // line matches with the pattern
	 name = m.Result("$2");
}

The pattern e.g. the "(.*)customername=(.*)" could be extern to the application, for instance put in the configuration file and you have no to touch the code when the pattern is changing.
Note. m.Result("$1"); will return the string before 'cusomername=' if there is.
The m.Result("$2") returns the string after 'customername=' if there is.
-obislavu-

 

[notrut]

Awesome, Thanks everyone!