How to dynamically (in code behind) add key/value pair to dropdown combo box in asp.net 2.0 C#

Question

User193260626 posted

I have my data in the form of a Dictionary List object (key/value pair).  I want to populate a dropdown combo box with this object with both the key and value as the combo box index and value respectively. It seems to be not that easy in asp.net 2.0 C#. I am able to add just the value as follows:

foreach (KeyValuePair<int, string> kvp in states)

{

                 cboStates.Items.Add(kvp.Value.ToString());

}

In the above sample "states" is the Dictionary object. But I don't know how to add the key as the index in the combo box. I saw an article in VB.Net (http://aspalliance.com/1059_CodeSnip_How_to_Add_DataValues_for_Corresponding_Entries_in_a_Combo_Box_Using_Visual_Basic_NET.1 ) which creates a fake object with the key/value pair, and adds the object to the Items colletion of the combo box. But this method didn't work in C#.

 

foreach (KeyValuePair<int, string> kvp in states)

{

                     cboState.Items.Add(new AddToComboBox(Convert.ToInt32(kvp.Key), Convert.ToString(kvp.Value)));

 

}

where AddToComboBox is the fake object with key/value as public properties. When I tried this I got, "The best overloaded method match for 'System.Web.UI.WebControls.ListItemCollection.Add(string)' has some invalid arguments" error. Any help is greatly appreciated.

 

Thanks

 

 

Answer 1

User849259894 posted

 

foreach (KeyValuePair<int, string> kvp in states)
{ 
  cboStates.Items.Add(New ListItem(kvp.Value.ToString(), kvp.Key.ToString()) ;

}

 

Answer 2

User193260626 posted

Thanks a lot. It worked!

Answer 3

User1736992962 posted

I have my data in the form of a Dictionary List object (key/value pair).  I want to populate a dropdown combo box with this object with both the key and value as the combo box index and value respectively.

Try This :

ddlAnuraktiRoles.DataSource = dictionaryObject;
ddlAnuraktiRoles.DataTextField = "Key"; 
ddlAnuraktiRoles.DataValueField = "Value"; 
ddlAnuraktiRoles.DataBind();

Cheers!
Gaurav.
Anurakti Solutions!
www.Anurakti.com