C#: How to eliminate whitespaces in a string...

[Saravanan Krishnan]

Hi, i'm writting a windows application in C# the functionality that i'm trying is to implement is to add items to a combo box at run time & when i select one item, my app should filter the list contents based on the selection i made in the combo box.

I'm able to add items to combo box and also filter the list contents. But the only trouble i'm facing is when i select a item with a whitespace in the middle of a string in the conbo box, it does not filter the records and displays nothing in the DGV.

I'm in serious urgency, any help is appreciable...

Thanks in Advance...

Saravanan Krishnan

[davidson1]

use Trim() fuction which elimates whitespace...

Davidson

10 March 2008

[Saravanan Krishnan]

<<

use Trim() fuction which elimates whitespace...

Davidson

10 March 2008

>>posted davidson

I've used List<T> where T is a class with various properties and added values to those properties vItemList is the instance of List<T> now i'm filtering the Items Property and based on the combo box selection...
[Heres the code snippet]

string str;
str = cmbitem.selecte dtext;
str = str.replace(" ","");
//i tried str = str.trim();
//Even i tried str = str.replace(" ",string.empty) ;
vItemList.Filte r = "Items=" + str;

This works(filters) fine when a string like "LAPTOP" is selected from the combobox and the filtered records are displayed in the dgv but it doesn't display anything when a string like "Notebook PC" is selected...

Now say me where am i making mistake....

Thanks...

Saravanan Krishnan

[tagg3rx]

I Think the following Code Snip it will give you what your looking for.

        string _str = "Laptop PC";
        List<string> _vals = new List<string>{"Computer", "Monitor", "Laptop PC"};
        List<string> _result = new List<string>();
        foreach (string _val in _vals)
            if (_val.Contains(_str))
                _result.Add(_val);

[Plater]

The line:
str = str.replace(" ","");
Should have been removing the whitespace correctly, did you set a breakpoint and look to see what it produces?
Is it possible that that is NOT a whitespace in there?

Can you filter on a name that should have a space and then doesn't?
I'm not realy clear on what you're up to.

[Saravanan Krishnan]

Using this line
vItemList.Filte r = "Items='" + str + "'";

Instead of
vItemList.Filte r = "Items=" + str;

this code helped me out, if someone's out for this use this...

Thanking all for spending your time helping me...

Saravanan Krishnan

[Plater]

Ahh ok, use single quotes around the value.
i.e. Items='Notebook PC'

[Saravanan Krishnan]

By using the code snippet which i posted in my last reply works absolutely fine, the itemlist filters the records perfectly while even the string with a whitespace is selected [like "Notebook PC"].

Similarly i have multiple combo boxes in my form and i also want to filter the records in my list based on multiple combo boxes selections as well as single combo box (it's left to users choice), now how do i identify that the user has selected one or multiple combo boxes and based on the selections the list has to filter...

I thought i would use switch case to identify the selected number of combo boxes, but i dont know how to give the switch expression. Or else is there any alternate way to do that...


Thanks in advance...

[Plater]

If a user has not made a selection in a combo box, the selected index should be -1 yes? Could you just check them all to see if a valid combobox index is selected?
(Note, if it's not -1, you can always have a first entry say "Do Not Filter" or something and know to ignore index of 0 as well)

[tagg3rx]

Don't forget to add autopostback to the combo boxes or you wont be able to perform any action when the user checks a box