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Reuse ComboBox

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ComboBox
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Mike
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Mike asked on 25 Aug 2008, 03:27 PM
I'm usnig your RadCOmboBox on several of my pages.  It is the same in all pages "Users"  How can I make it so that the code behind is reused for the one dropdownlist?  Also, how do I access the dropdown items in the events of the code behind like Button_OnClick ?

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Rosi
Telerik team
answered on 26 Aug 2008, 07:16 AM
Hello George,

I suggest you place the RadComboBox in an User Control and use this user control where you need id.

As for accessing items you can use the Items property of RadComboBox . For example to access the first item you can use the following code:

C#
string itemtext = RadComboBox1.Items[0].Text; 

VB
Dim itemtext As String = RadComboBox1.Items(0).Text  
 

More about RadComboBox you can find in our online help documentation.


Regards,
Rosi
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Mike
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answered on 26 Aug 2008, 01:28 PM
I am using Q2 2008 ASP.NET AJAX and wondering why this error is happening when trying to access the dropdownlist

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS1061: 'ASP.controls_dropdownlist_ascx' does not contain a definition for 'SelectedValue' and no extension method 'SelectedValue' accepting a first argument of type 'ASP.controls_dropdownlist_ascx' could be found (are you missing a using directive or an assembly reference?)

Source Error:

Line 129: if (!String.IsNullOrEmpty(Convert.ToString(RadComboBox1.SelectedValue)))Line 130:        {
Line 131:            if (Convert.ToInt32(RadComboBox1.SelectedValue) == (int)Enumeration.HasValue.No)

This is also not working. :(
string itemtext = RadComboBox1.Items[0].Text;  
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Rosi
Telerik team
answered on 26 Aug 2008, 02:18 PM
Hello George,

The reason for the error is the way you access the combobox. Please find the sample project which works as expected.

Regards,
Rosi
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Mike
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answered on 26 Aug 2008, 03:16 PM
Rosi,
I don't want this in my page_load

 protected void Page_Load(object sender, EventArgs e)  
    {  
        RadComboBox combo1 = (RadComboBox)WebUserControl1.FindControl("RadComboBox1");  
        string itemText = combo1.Items[0].Text;  
        Response.Write(itemText);  
    } 

I want to have it in the Search Method passing the arguments and it is always sending the default item even when I select something else in the dropdownlist.  Is it because I am using AJAX ASP.NET ?
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