Combobox in C# i Need to fill two value in combo box

Question

i have a problem with C# code for combo box my code is here

cmbProjectName.Items.Clear();
if (obds.Tables.Count > 0 && obds.Tables[0].Rows.Count > 0)
{
    for (int iCount = 0; iCount < obds.Tables[0].Rows.Count; iCount++)
    {
        cmbProjectName.Items.Add(obds.Tables[0].Rows[iCount]["Project_Name"].ToString()); 
    }
}

Value Add in Combo Box but i will to add the index of this item my self for further operation on other search please suggest me...

Could you clarify your question more please? it is unclear in its current state, are you saying that combobox entries need to hold two values? if so you need an object model - Also is this winforms? wpf? asp? — Sayse, Aug 01 '14 at 08:22
Yes i need to enter index of my id which i will use in future for finding result or other — user3887728, Aug 01 '14 at 08:54

JAEP · Answer 1 · 2014-08-01T09:16:38.173

You can create a class

private class Project
{
     public int ID {get; set;}
     public string Name {get; set;}

     public Project (int _id, string _name)
     {
          ID = _id;
          Name = _name
     }
}

Then, you transform the method in this way

List<Project> listPrj = new List<Project>();

 if (obds.Tables.Count > 0 && obds.Tables[0].Rows.Count > 0)
 {
        for (int iCount = 0; iCount < obds.Tables[0].Rows.Count; iCount++)
        {
            listPrj.Add(new Project(int.Parse(obds.Tables[0].Rows[iCount]["Project_ID"].ToString()), obds.Tables[0].Rows[iCount]["Project_Name"].ToString());
        }    
 }

cmbProjectName.DisplayMember = Name;
cmbProjectName.ValueMember = ID;
cmbProjectName.DataSource = listPrj;

Its not asp.net.. its desktop application – user3887728 Aug 01 '14 at 08:56 — user3887728, Aug 01 '14 at 08:56

score 0 · Answer 2 · answered Aug 01 '14 at 09:17

JAEP's solution can also be applied in desktop apps. Please check this MSDN page about ValueMember.

After you specify DisplayMember, ValueMember, and DataSource, you can get selected text and selected value with ComboBo.SelectedText and ComboBo.SelectedValue.

Or you simply just want the index, you can use ComboBo.SelectedIndex.

score 0 · Accepted Answer · edited May 23 '17 at 12:04

JAEP's solution using class will work. Binding to a dictionary is another way, here you don't have to create extra class. Source SO question

The code will be like below in your case. Replace iCount with the index you want.

cmbProjectName.Items.Clear();
Dictionary<int, string> projectsDictionary = new Dictionary<int, string>();
if (obds.Tables.Count > 0 && obds.Tables[0].Rows.Count > 0)
{
    for (int iCount = 0; iCount < obds.Tables[0].Rows.Count; iCount++)
    {
        projectsDictionary.Add(iCount, obds.Tables[0].Rows[iCount]["Project_Name"].ToString());
    }
}   
cmbProjectName.DataSource = new BindingSource(projectsDictionary, null);
cmbProjectName.DisplayMember = "Value";
cmbProjectName.ValueMember = "Key";

Code to retrieve key or value.

string value = ((KeyValuePair<int, string>)cmbProjectName.SelectedItem).Value;
int key =  ((KeyValuePair<int, string>)cmbProjectName.SelectedItem).Key;

Yes, I have used iCount as the key. You have to replace iCount with your index value in this statement `projectsDictionary.Add(iCount..` — Baga, Aug 01 '14 at 20:56

Combobox in C# i Need to fill two value in combo box

3 Answers3