Split a dropdown box value with two string

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Hello Friend

i have an dynamic Dropdown box with the value like
1) 100 Gm
2) 250 Gm
3) 500 Gm
4) 1 KiloGram

now i want to split this value into two variable like 100 is in INT type and Gm is in String Type...
How can i do that .....

Thank You All...

Posted 24-Aug-12 4:21am

Yatin chauhan

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Comments

Kenneth Haugland 24-Aug-12 10:22am

String.Split(" ") ?

4 solutions

Solution 1

The split method of the string class will turn your string in to a string array. If you split on the space, you can use int.TryParse to get the int value out and the second value will just be the unit of measure.

You could also set the value of each item in the drop list to be the value in grams. By which I mean, display what you're showing, but there's a hidden 'value' field you can store a normalised value in.

Posted 24-Aug-12 4:24am

Christian Graus

v4

Solution 3

C#

string values[]  = Regex.Split(lineValue," ");

int amount = int.Parse(values[0]);
string unit = values[1];

Posted 24-Aug-12 4:32am

L Viljoen

Updated 24-Aug-12 9:19am

v2

Comments

Christian Graus 24-Aug-12 10:43am

you should never assume a collection has more than one element in it, without checking first. It will blow up

ZurdoDev 24-Aug-12 10:52am

I thought you were all about helping people learn instead of doing everything for them? What you have pointed out is basic, but correct.

Christian Graus 24-Aug-12 11:08am

Yes, I just explained to him the issue of his code. I think you need psychiatric help

ZurdoDev 24-Aug-12 11:13am

"I think you need psychiatric help" Can I get your doctor's number? :)

Christian Graus 24-Aug-12 11:18am

You know, I regret saying that. How about, if you want to abuse me for being smarter than you, we do it in the soapbox and not pollute this forum ?

L Viljoen 24-Aug-12 10:56am

That being the case wouldnt you think that the data in the dropdown would be invalid in the same sentence one could say never assume a string value would be convertable to an int. :)

Christian Graus 24-Aug-12 11:09am

Yes, but a site should not blow up due to bad data. And that's why I said to use TryParse, as it won't blow up when you call it, it will let you know if the value is not an int. Storing a normalised value in the value field is still the best solution.

L Viljoen 24-Aug-12 11:57am

Yes but don't you think that should be the concern of the system creating the records to put in the list rather than the one extracting the values ?

All I am saying is validate the value once, than having to validate it countless times when its accessed.

I mean obviously we at the top of our fields but don't you think we have better topics to debate than bicker about pedantic subjects over a question that really just warrants a straight forward answer than I in-depth analysis and performance comparison chart (because this is what it usually goes down to)

We ppl in the science and technology field can be so stubborn sometimes :)

Christian Graus 24-Aug-12 12:04pm

They are the one system. You're right, I am being pedantic, I just think it's always best to design systems so they won't blow up from bad data. Often the source of data is out of our control. Check all your assumptions, is really my only point.

I like the idea that I am in the science and technology field. I thought I was just a code monkey :P

L Viljoen 24-Aug-12 12:07pm

Well assumption is the mother of all "Unhanded exception occurred".

Solution 4

Here is one approach.

Aspx page.

XML

<asp:DropDownList ID="ddlWeight" runat="server">
<asp:ListItem Text="100 Gm" Value="100 Gm"></asp:ListItem>
<asp:ListItem Text="250 Gm" Value="250 Gm"></asp:ListItem>
<asp:ListItem Text="500 Gm" Value="500 Gm"></asp:ListItem>
<asp:ListItem Text="1 KiloGram" Value="1 KiloGram"></asp:ListItem>

Code behind

C#

int Quantity;
bool Result;


string[] strUnit = new string[ddlWeight.Items.Count];
int[] intQuantity = new int[ddlWeight.Items.Count];

for (int i = 0; i < ddlWeight.Items.Count; i++)
{
    string[] StrSplitResult = ddlWeight.Items[i].Text.Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);

    if (StrSplitResult.Length > 0)
    {
        Result = int.TryParse(StrSplitResult[0].Trim(), out Quantity);

        if (Result)
        {
            intQuantity[i] = Quantity;
        }
    }

    if (StrSplitResult.Length > 1)
    {
        strUnit[i] = StrSplitResult[1].Trim();

    }
}

Posted 24-Aug-12 9:50am

__TR__

Comments

Yatin chauhan 25-Aug-12 0:54am

I dont have dropdown.. i have bind that dropdown dynamic which already store in database in two column like:-
Quantity Unit
100 Gram
200 Gram
300 Gram
1 Kilogram

i bound in dropdown with concate.

__TR__ 25-Aug-12 14:26pm

The above code (in code behind) will be the same irrespective of whether the list items are coming from database or entered in the aspx page. The solution focuses on how to split the list items in dropdown because that's what you asked and not on how to display data from database in a dropdown list. You can use the above piece of code after you bind your dropdown to a datasource.

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ZurdoDev · Accepted Answer · 2012-08-24T04:24:00

Solution 2

There are several ways to do it. One easy way would be:

C#

String tempValue = < dropdownlistvalue >
Int32 numberPart = tempValue.Split(' ')[0];
String textPart = tempValue.Split(' ')[1];

Use the Split() method on a string. You get it a character to split on and then you can reference them by index.

Posted 24-Aug-12 4:24am

ZurdoDev

Updated 24-Aug-12 4:40am

v2

Comments

RAKESH CHAUBEY 24-Aug-12 10:31am

ryanb31 .Can U plz Provide a small example With Code view and post it ..just take 2 drpdown and Show a very simple example of that ..i also have same doubt

ZurdoDev 24-Aug-12 10:40am

That is a code example that I have.

Christian Graus 24-Aug-12 10:42am

You would be better off using the value field of the control, than string mashing. Ryan is just repeating the worse of the two suggestions I made.

ZurdoDev 24-Aug-12 10:46am

I answered the question. I have had times where I need 2 IDs and so I will put them both into the Value field and parse it. Some real world experience might help you out some.

Christian Graus 24-Aug-12 10:48am

I'm sorry, I'm not going to argue with someone so foolish as to think that calling split twice is real world code, or that string mashing is better than a clean way of storing the values you need.

ZurdoDev 24-Aug-12 10:49am

I agree with you. "Google it" would have been a better answer. :) Thanks for the help.

Christian Graus 24-Aug-12 10:43am

Um, you call split twice instead of storing the value ? Isn't that a waste of resources ? And you don't check if there's two values returned ? People will copy your code from this site verbatim and use it in real world systems, if you must post code for people who refuse to learn, at least make it good.

ZurdoDev 24-Aug-12 10:45am

I'm flattered you're following me.

Christian Graus 24-Aug-12 10:47am

ROTFL - don't fool yourself

RAKESH CHAUBEY 24-Aug-12 11:42am

Cmmn ..What is this ..Be Professional ..

Sandip.Nascar 24-Aug-12 11:59am

I agree with Christian, there is no need to split twice. I understand this will be a tiny bit of micro optimization. Think about several items with comma separated(30 or even more).

There are several guys who are just beginners and if they follow the split 30 times, you can understand the resource they are wasting.

So, we all better try to post the code as optimized as we can, so that the guys who are trying to understand by posting question can get into the right direction.