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Regadring AJAX ASP.NET RadComboBox

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ComboBox
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keerthi
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keerthi asked on 24 Oct 2008, 06:41 PM
Hi,

I am very new to Telerik controls,
i am facing a problem where i have two RadDropDowns,while selecting the first dropdown,second dropdownlist is populated.

While in button click event i am not able to get second drop down selected value,eventhough dropdown is having values before the click event.

<rad:RadComboBox ID="RadComboBox1" runat="server" Width="200px" Height="115px" TabIndex="1"OnClientSelectedIndexChanging="LoadOrganizations" OnItemsRequested="RadComboBox1_ItemsRequested"EnableLoadOnDemand="True" AllowCustomText="False" ItemRequestTimeout="500" MarkFirstMatch="True">
<Items> </Items>
</rad:RadComboBox>
<rad:RadComboBox ID="RadComboBox2" runat="server" Width="200px" Height="115px" TabIndex="2"OnClientItemsRequested="ItemsLoaded"OnItemsRequested="RadComboBox2_ItemsRequested">
<Items></Items>
</rad:RadComboBox>

 

function LoadOrganizations(combo, eventarqs) {
var countriesCombo = $find("RadComboBox2");
var item = eventarqs.get_item();
countriesCombo.set_text(
"Loading...");
if (item.get_index() > 0) {countriesCombo.requestItems(item.get_value(), false); }
else {countriesCombo.set_text(" No Records Exist ");
countriesCombo.clearItems();}
}

 

 

function ItemsLoaded(combo, eventarqs) {
var countriesCombo = $find("RadComboBox2");
if (combo.get_items().get_count() > 0) {
combo.set_text(combo.get_items().getItem(0).get_text());
combo.get_items().getItem(0).highlight();
}
else {
countriesCombo.set_text(
" No Records Exist ");
countriesCombo.clearItems();
}
countriesCombo.commitChanges();
//combo.showDropDown(); }
C#

 

protected

 

void Page_Load(object sender, EventArgs e){
if (!IsPostBack){
LoadJurisdictions(); // ;db call for jurisdictions
RadComboBox1.Items.Insert(0,
new RadComboBoxItem("- Select Jurisdiction -"));
}} 

 

 

protected void RadComboBox1_ItemsRequested(object o, RadComboBoxItemsRequestedEventArgs e){
LoadJurisdictions(); //dbcall for juris
}

 

 

protected void RadComboBox2_ItemsRequested(object o, RadComboBoxItemsRequestedEventArgs e){
LoadOrg(e.Text);// db call for org
}

 

protected

 

void btnsubmit_Click(object sender, EventArgs e){
RadComboBoxItem r1 = RadComboBox1.SelectedItem;

RadComboBoxItem r2 = RadComboBox2.SelectedItem;

 

// getting null for  r2
}

 


 

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Rosi
Telerik team
answered on 27 Oct 2008, 07:17 AM
Hello,

RadComboBoxItems are not persisted on the server if they are loaded on demand. I suggest you use the SelectedValue and Text properties of the controls instead of the SelectedItem property.

For example:
protected void btnsubmit_Click(object sender, EventArgs e){   
string r1 = RadComboBox1.SelectedValue;  
 
string r2 = RadComboBox2.SelectedValue;  
// getting null for  r2  
}  
 

For more details you can read our help article.

Regards,
Rosi
the Telerik team

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keerthi
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Rosi
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