Resetting a RadComboBox...

[mark baer]

I have two RadComboBoxes on my page that I can not reset.  Below is their definition and the code behind I am using to reset them.  I have two other RadComboboxes on that same page that I CAN reset.  The main difference is that the two I can not reset are "LoadOnDemand".  I've searched the forums and found a few people with the same problems, but I don't see an answer that works yet.

See attached image for example...

Help?

Thanks

Mark

HTML:

<telerik:RadComboBox ID="cboAgencies" runat="server" EmptyMessage="Type to
Search..."<BR>
EnableAutomaticLoadOnDemand="true" EnableVirtualScrolling="true"
ItemsPerRequest="100"<BR>
AutoPostBack="true" MarkFirstMatch="True" Skin="WebBlue" Width="205px"
OnSelectedIndexChanged="cboAgencies_SelectedIndexChanged"><BR>
<WebServiceSettings Method="GetAgencies" Path="Talent.aspx"
/><BR>
</telerik:RadComboBox><BR><BR> <telerik:RadComboBox ID="cboAgents"
runat="server" EmptyMessage="Type to
Search..."<BR>
EnableAutomaticLoadOnDemand="true" EnableVirtualScrolling="true"
ItemsPerRequest="100"<BR>
MarkFirstMatch="True" Skin="WebBlue" Width="205px" AutoPostBack="true"
OnSelectedIndexChanged="cboAgents_SelectedIndexChanged"><BR>
<WebServiceSettings Method="GetAgents" Path="Talent.aspx"
/><BR>
</telerik:RadComboBox><BR>

Code Behind(on a Button Click):

 

<P>cboAgencies.Text = null;    //Also tried
""<BR>cboAgencies.SelectedValue = null;<BR>cboAgencies.ClearSelection();</P>
<P><BR>cboAgents.Text = null;<BR>cboAgents.SelectedValue =
null;<BR>cboAgents.ClearSelection();</P>

[Shawn Krivjansky]

Curious about this myself.

So, my specific question is...  how to get the "loadondemand" combobox back into it's initial state after you have already loaded/selected/used it??  I mean... I want the "empty text" to appear like it wasn't touched before (even though it has been).  I've tried reloading, rebinding, clearing... etc.  Nothing seems to get it back into it's initial state.

[Kalina]

Hello,

When you use RadComboBox with Load-On-Demand enabled you can "reset" the control at server-side by clearing its selection and text:

<telerik:RadComboBox ID="RadComboBox1" runat="server"
    EmptyMessage=" -Select- "
    OnItemsRequested="RadComboBox1_ItemsRequested"
    EnableLoadOnDemand="true">
</telerik:RadComboBox>
 <asp:Button ID="btnTest" runat="server"
    Text="Clear selection"
    OnClick="BtnTest_OnClick" />

protected void RadComboBox1_ItemsRequested(object sender, RadComboBoxItemsRequestedEventArgs e)
{
    this.RadComboBox1.Items.Add(new RadComboBoxItem("item1", "1"));
    this.RadComboBox1.Items.Add(new RadComboBoxItem("item2", "2"));
    this.RadComboBox1.Items.Add(new RadComboBoxItem("item3", "3"));
}


protected void BtnTest_OnClick(object sender, EventArgs e)
{
    this.RadComboBox1.Text = "";
    this.RadComboBox1.ClearSelection();

}

All the best,
Kalina
the Telerik team

[Shawn Krivjansky]

Thanks for the info.  I hadn't seen this done in any of the examples or documentation before.  Will be a big help.

[Kalina]

Hello Shawn Krivjansky,

Thank you for the suggestion.
We will consider adding this info in our online help.

Regards,
Kalina
the Telerik team