How to get value from combobox using substring in C#

Question

I have a combo box which have item strings like:

1 .  Apple
2 .  Banana
3 .  Mango

1,2,3 are category id & Apple, Banana, Mango is Category Name.

I want to know Category Id From comboBox using Category name which is sub-string of ComboBox item.

example:

I want to know the Category Id of Banana. which is 2.

Any help ?

Thanks to all of you especially Pranay Rana Your answer is really useful. that is my first forum & second question this forum is really so active. — syed Ahsan Jaffri
– syed Ahsan Jaffri, Commented Aug 24, 2012 at 10:26
-1 for unclear question. you should write your question clearly and complete. like what you commented on Schaliasos's answer — Hamed
– Hamed, Commented Aug 24, 2012 at 10:29
@hamed thanks next time i will explain completely Insha Alah — syed Ahsan Jaffri
– syed Ahsan Jaffri, Commented Aug 24, 2012 at 11:02

Hamed · Accepted Answer · 2012-08-24 10:10:36Z

4

Use this code to an event that should be after you selected the item in comboBox :

        string []str;
        str = comboBox1.Text.Split(' ');
        string categoryId = str[0];

edited Aug 24, 2012 at 10:10

answered Aug 24, 2012 at 9:40

Hamed

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2 Comments

Pranay Rana Over a year ago

becuse how i get to know str[0] is related to Banana or Apple or someother string...answer is incomplete

Hamed Over a year ago

@PranayRana I thought he wants to fetch the ID of category after selecting it on comboBox.

chaliasos · Accepted Answer · 2012-08-24 10:09:17Z

3

Try the following code. It will give the CategotyId of the selected Category.

private void ComboBox1_SelectedIndexChanged(object sender, System.EventArgs e) {
    string selectedText = comboBox1.SelectedText;
    string categoryId  = selectedText.Substring(0, selectedText.IndexOf(" "));

    MesasgeBox.Show(categoryId);
}

edited Aug 24, 2012 at 10:09

answered Aug 24, 2012 at 9:43

chaliasos

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4 Comments

syed Ahsan Jaffri Over a year ago

i am not selecting any index of combobox & not selectedIndexChanged method is called. Combo box is filled with values & now i am selecting these strings like Mango from grid box instead of again fetching category id from data base which is costly in term of processing cost i wants to take that value from combobox which is already filled & much faster. thanks For Answer

chaliasos Over a year ago

The point of my answer is to use the Substring method. You can use it in any method you want. I don't understand the reason of downvoting.

syed Ahsan Jaffri Over a year ago

i did not downvoted for you. Your answer was helpful really thanks Schaliasos.

Hamed Over a year ago

Pranay Rana downvoted you. the reason is as what is he commented on my answer

Pranay Rana · Accepted Answer · 2012-08-24 09:43:11Z

2

    foreach (object item in cmb.Items)
    {
      string[] str = item.ToString().split(new char[] {' '}
, StringSplitOptions.RemoveEmptyEntries);
      if(str[1] == "Banana")
      {
           Console.Write(str[0]);
      }
    }

answered Aug 24, 2012 at 9:43

Pranay Rana

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2 Comments

Hamed Over a year ago

There is 3 space between category ID and category name.it should be str[str.count-1] == "Bannana"

Pranay Rana Over a year ago

@hamed - that y i added StringSplitOptions.RemoveEmptyEntries in my spilt function as parameter so it remove null entries..read the documenttation of split that will give you more idea

syed Ahsan Jaffri · Accepted Answer · 2012-08-24 10:55:52Z

2

@Pranay Rana Your Answer Helped me: I wrote my method like that

private string get_Godown_id(string godown_name)
    {
        foreach (object item in cb_send_to.Items)
        {
            if (item.ToString().Split('.')[1].Trim() == godown_name)
            {
                return (item.ToString().Split('.')[0]);
            }
        }
        return "";
    }

answered Aug 24, 2012 at 10:55

syed Ahsan Jaffri

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Comments

Shaan · Accepted Answer · 2012-08-26 07:18:55Z

1

foreach (object item in cb_send_to.Items)
    {
        if (item.ToString().Split('.')[1].Trim() == godown_name)
        {
            return (item.ToString().Split('.')[0]);
        }
    }

answered Aug 26, 2012 at 7:18

Shaan

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