Questions on UI for ASP.NET AJAX Forum

110,740 questions

11 answers

388 views

After I have built the grid, I now want to initiate the export to excel. When I go into the grid properties and set the master table view's command item settings to show export to excel button = true and set the commanditemdisplay = top, the display on top of the grid shows up in the designer, but when I run the application it does not appear. What are some reasons this could be happening?

Thanks,
Chuck

Grid

answered on 28 Jul 2011

4 answers

593 views

RadGrid with dynamic columns

hi i adding columns to RadGrid on RadButton Click event
all working fine
when i sort the grid with Header Click or When i Filter the grid
the RadGrid disappeared i suspect the columns or removed automatically after that if i click any button to postback the RadGrid appear with dynamic columns but no data inside the rows
this is my code

RadGrid1.Columns.Clear()

Dim bc As New GridBoundColumn

RadGrid1.MasterTableView.Columns.Add(bc)

bc.DataField = "File Name"

bc.HeaderText = "File Name"

bc.SortExpression = "File Name"

'bc.ItemStyle.Width = New Unit(80, UnitType.Pixel)

bc = New GridBoundColumn

RadGrid1.MasterTableView.Columns.Add(bc)

bc.DataField = "File Path"

bc.HeaderText = "File Path"

bc.SortExpression = "File Path"

RadGrid1.DataSource = profiledatas

RadGrid1.DataBind()

aspx

<telerik:RadGrid ID="RadGrid1" AllowSorting="true" AllowFilteringByColumn="true" AutoGenerateColumns="false" runat="server">

<MasterTableView>

<Columns>

</Columns>

<ItemStyle HorizontalAlign="Left" />

<HeaderStyle HorizontalAlign="Left" />

</MasterTableView>

</telerik:RadGrid>

my RadGrid inside RadAjaxPanel

how to solve this issue

Grid

answered on 28 Jul 2011

6 answers

374 views

DefaultValue Empty for MultiLine Textbox

Hello -

I'm trying to access a RadTextBox's defaultValue through JavaScript. When I have the textbox's mode set to SingleLine, I can get the defaultValue through the following JavaScript:

this.defaultValue;

However, when I have the textbox's mode set to MultiLine, the defaultValue comes up as an empty string. Does anybody have any thoughts on how to get the defaultValue of a multiline textbox?

Input

answered on 28 Jul 2011

1 answer

78 views

Formview updated values not displayed on the first button click

Hello,

I have following labels (updtlbl1,updtlbl2,updtlbl3) inside a form view, They are updated by a button(btnSave) outside the formview.
I am updating the database with entity model and I am using RadAjaxmanager

I have the code as below. Data is saved successfully at the first click of the button in the db but the updated values are not displayed in form view at the first click, On the second click the values in the formview are updated correctly

I need the updated data to be displayed in formview at the first click. Please help

<P><asp:FormView runat="Server" ID=Formview1"

><BR> <ItemTemplate></P>

<P><table cellpadding="10" cellspacing="0" border="0"

class="controlLabel"><BR>

<tr><BR>

<BR>

<td>

<asp:Label ID="lbl1" runat="server" Text="Dis1" />: 

<asp:Label ID="updtlbl1" EnableViewState="true" runat="server"

/></td>

<td>

<asp:Label ID="lbl2" runat="server" Text="Dis By"

/>: <asp:Label ID="updtlbl2" runat="server" />

</td>

<td>

<asp:Label ID="lbl3" runat="server" Text="Dis Dt"

/>: <asp:Label ID="updtlbl3" runat="server"

/></td>

</tr>

</table></P>

<P></ItemTemplate>

</

asp:FormView

<asp:Button runat="server" Text="Save" ID="btnSave"

<P><telerik:RadAjaxManager ID="RadAjaxManager1" runat="server"

LoadingPanelID="RadAjaxLoadingPanel1"

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="btnSave >

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="Formview1" />

<BR>

</UpdatedControls>

<BR>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

Ajax

answered on 28 Jul 2011

1 answer

156 views

Export to excel, missing columns

When I export to excel only one column (UnitSF) is being exported. Any suggestions?
I also found it works for <Excel Format = "Html" />
But NOT for <Excel Format = "ExcelML" />
Note: exporting to pdf exports all columns.

<telerik:RadGrid runat="server" ID="RadGrid1" AllowPaging="True" AllowSorting="True"

AllowFilteringByColumn="True" PageSize="50" AutoGenerateColumns="False" DataSourceID="ds1"

GridLines="None" Height="500px" ShowFooter="True" Skin="WebBlue"

OnExcelMLExportRowCreated="RadGrid1_ExcelMLExportRowCreated"

OnExcelMLExportStylesCreated="RadGrid1_ExcelMLExportStylesCreated"

ShowStatusBar="true">

<ClientSettings>

<ClientEvents OnRowContextMenu="RowContextMenu" />

<Resizing AllowColumnResize="true" AllowResizeToFit="true" ClipCellContentOnResize="false" />

<Scrolling AllowScroll="True" UseStaticHeaders="True" SaveScrollPosition="true" />

</ClientSettings>

<ExportSettings ExportOnlyData="true" IgnorePaging="false" OpenInNewWindow="true">

<Excel Format="ExcelML" />

</ExportSettings>

<SortingSettings SortedBackColor="Red" />

<MasterTableView TableLayout="Fixed" OnDataBinding="MasterTableView_DataBinding"

OverrideDataSourceControlSorting="true" EnableHeaderContextMenu="true" EnableHeaderContextAggregatesMenu="true"

EnableHeaderContextFilterMenu="true" CommandItemDisplay="Bottom">

<PagerStyle Mode="NextPrevNumericAndAdvanced" AlwaysVisible="True" />

<CommandItemSettings ShowAddNewRecordButton="false" ShowExportToPdfButton="true"

ExportToPdfText="Export to PDF" ShowExportToExcelButton="true" />

<Columns>

<telerik:GridCheckBoxColumn DataField="FutureLease" DataType="System.Boolean" FilterControlAltText="Filter FutureLease column"

HeaderText="Future Lease" SortExpression="FutureLease" UniqueName="FutureLease"

HeaderStyle-Width="120px">

</telerik:GridCheckBoxColumn>

<telerik:GridBoundColumn DataField="ShoppingCenterID" FilterControlAltText="Filter ShoppingCenterID column"

HeaderText="Shopping Center ID" SortExpression="ShoppingCenterID" UniqueName="ShoppingCenterID"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="ShoppingCenterName" FilterControlAltText="Filter ShoppingCenterName column"

HeaderText="Shopping Center Name" SortExpression="ShoppingCenterName" UniqueName="ShoppingCenterName"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="UnitNumber" FilterControlAltText="Filter UnitNumber column"

HeaderText="Unit #" SortExpression="UnitNumber" UniqueName="UnitNumber" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseNumber" DataType="System.Int32" FilterControlAltText="Filter LeaseNumber column"

HeaderText="Lease Number" SortExpression="LeaseNumber" UniqueName="LeaseNumber"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="UnitSF" DataType="System.Int32" FilterControlAltText="Filter UnitSF column"

HeaderText="UnitSF" SortExpression="UnitSF" UniqueName="UnitSF" DataFormatString="{0:n0}"

Aggregate="Sum" HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

<FooterStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TenantName" FilterControlAltText="Filter TenantName column"

HeaderText="TenantName" SortExpression="TenantName" UniqueName="TenantName" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TenantNumber" DataType="System.Int32" FilterControlAltText="Filter TenantNumber column"

HeaderText="TenantNumber" SortExpression="TenantNumber" UniqueName="TenantNumber"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseBeginDate" DataType="System.DateTime" FilterControlAltText="Filter LeaseBeginDate column"

HeaderText="Lease Begin Date" SortExpression="LeaseBeginDate" UniqueName="LeaseBeginDate"

DataFormatString="{0:MM/dd/yyyy}" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="MoveInDate" DataType="System.DateTime" FilterControlAltText="Filter MoveInDate column"

HeaderText="Move In Date" SortExpression="MoveInDate" UniqueName="MoveInDate"

DataFormatString="{0:MM/dd/yyyy}" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseEndDate" DataType="System.DateTime" FilterControlAltText="Filter LeaseEndDate column"

HeaderText="LeaseEndDate" SortExpression="LeaseEndDate" UniqueName="LeaseEndDate"

DataFormatString="{0:MM/dd/yyyy}" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseStatus" FilterControlAltText="Filter LeaseStatus column"

HeaderText="LeaseStatus" SortExpression="LeaseStatus" UniqueName="LeaseStatus"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="UnitType" FilterControlAltText="Filter UnitType column"

HeaderText="UnitType" SortExpression="UnitType" UniqueName="UnitType" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LastTenantMoveoutDate" DataType="System.DateTime"

FilterControlAltText="Filter LastTenantMoveoutDate column" HeaderText="LastTenantMoveoutDate"

SortExpression="LastTenantMoveoutDate" UniqueName="LastTenantMoveoutDate" DataFormatString="{0:MM/dd/yyyy}"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LastTenantBaseRent" DataType="System.Decimal"

FilterControlAltText="Filter LastTenantBaseRent column" HeaderText="LastTenantBaseRent"

SortExpression="LastTenantBaseRent" UniqueName="LastTenantBaseRent" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseType" FilterControlAltText="Filter LeaseType column"

HeaderText="LeaseType" SortExpression="LeaseType" UniqueName="LeaseType" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="ActualMoveoutDate" DataType="System.DateTime"

FilterControlAltText="Filter ActualMoveoutDate column" HeaderText="ActualMoveoutDate"

SortExpression="ActualMoveoutDate" UniqueName="ActualMoveoutDate" DataFormatString="{0:MM/dd/yyyy}"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TenantSICType" FilterControlAltText="Filter TenantSICType column"

HeaderText="TenantSICType" SortExpression="TenantSICType" UniqueName="TenantSICType"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseULICode" FilterControlAltText="Filter LeaseULICode column"

HeaderText="LeaseULICode" SortExpression="LeaseULICode" UniqueName="LeaseULICode"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="BaseRentPSF" DataType="System.Decimal" FilterControlAltText="Filter BaseRentPSF column"

HeaderText="BaseRentPSF" SortExpression="BaseRentPSF" UniqueName="BaseRentPSF"

DataFormatString="{0:c2}" HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="CAMPSF" DataType="System.Decimal" FilterControlAltText="Filter CAMPSF column"

HeaderText="CAMPSF" SortExpression="CAMPSF" UniqueName="CAMPSF" DataFormatString="{0:c2}"

HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TAXPSF" DataType="System.Decimal" FilterControlAltText="Filter TAXPSF column"

HeaderText="TAXPSF" SortExpression="TAXPSF" UniqueName="TAXPSF" DataFormatString="{0:c2}"

HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="INSPSF" DataType="System.Decimal" FilterControlAltText="Filter INSPSF column"

HeaderText="INSPSF" SortExpression="INSPSF" UniqueName="INSPSF" DataFormatString="{0:c2}"

HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="OtherPSF" DataType="System.Decimal" FilterControlAltText="Filter OtherPSF column"

HeaderText="OtherPSF" SortExpression="OtherPSF" UniqueName="OtherPSF" DataFormatString="{0:c2}"

HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="GrossChargesPSF" DataType="System.Decimal" FilterControlAltText="Filter GrossChargesPSF column"

HeaderText="GrossChargesPSF" SortExpression="GrossChargesPSF" UniqueName="GrossChargesPSF"

DataFormatString="{0:c2}" HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="BaseRentAnnual" DataType="System.Decimal" FilterControlAltText="Filter BaseRentAnnual column"

HeaderText="BaseRentAnnual" SortExpression="BaseRentAnnual" UniqueName="BaseRentAnnual"

DataFormatString="{0:c2}" HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="CAMAnnual" DataType="System.Decimal" FilterControlAltText="Filter CAMAnnual column"

HeaderText="CAMAnnual" SortExpression="CAMAnnual" UniqueName="CAMAnnual" DataFormatString="{0:c2}"

HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TAXAnnual" DataType="System.Decimal" FilterControlAltText="Filter TAXAnnual column"

HeaderText="TAXAnnual" SortExpression="TAXAnnual" UniqueName="TAXAnnual" DataFormatString="{0:c2}"

HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="INSAnnual" DataType="System.Decimal" FilterControlAltText="Filter INSAnnual column"

HeaderText="INSAnnual" SortExpression="INSAnnual" UniqueName="INSAnnual" DataFormatString="{0:c2}"

HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="OtherAnnual" DataType="System.Decimal" FilterControlAltText="Filter OtherAnnual column"

HeaderText="OtherAnnual" SortExpression="OtherAnnual" UniqueName="OtherAnnual"

DataFormatString="{0:c2}" HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="GrossAnnual" DataType="System.Decimal" FilterControlAltText="Filter GrossAnnual column"

HeaderText="GrossAnnual" SortExpression="GrossAnnual" UniqueName="GrossAnnual"

DataFormatString="{0:c2}" HeaderStyle-Width="120px">

<ItemStyle HorizontalAlign="Right" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseVersion" DataType="System.Int32" FilterControlAltText="Filter LeaseVersion column"

HeaderText="LeaseVersion" SortExpression="LeaseVersion" UniqueName="LeaseVersion"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Division" FilterControlAltText="Filter Division column"

HeaderText="Division" SortExpression="Division" UniqueName="Division" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="SuperRegion" FilterControlAltText="Filter SuperRegion column"

HeaderText="SuperRegion" SortExpression="SuperRegion" UniqueName="SuperRegion"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Region" FilterControlAltText="Filter Region column"

HeaderText="Region" SortExpression="Region" UniqueName="Region" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridCheckBoxColumn DataField="IsHotTenant" DataType="System.Boolean" FilterControlAltText="Filter IsHotTenant column"

HeaderText="IsHotTenant" SortExpression="IsHotTenant" UniqueName="IsHotTenant"

HeaderStyle-Width="120px">

</telerik:GridCheckBoxColumn>

<telerik:GridBoundColumn DataField="LeaseActivityCode8" FilterControlAltText="Filter LeaseActivityCode8 column"

HeaderText="LeaseActivityCode8" SortExpression="LeaseActivityCode8" UniqueName="LeaseActivityCode8"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridCheckBoxColumn DataField="LeaseHasOptions" DataType="System.Boolean"

FilterControlAltText="Filter LeaseHasOptions column" HeaderText="LeaseHasOptions"

SortExpression="LeaseHasOptions" UniqueName="LeaseHasOptions" HeaderStyle-Width="120px">

</telerik:GridCheckBoxColumn>

<telerik:GridCheckBoxColumn DataField="LeaseHasRentSteps" DataType="System.Boolean"

FilterControlAltText="Filter LeaseHasRentSteps column" HeaderText="LeaseHasRentSteps"

SortExpression="LeaseHasRentSteps" UniqueName="LeaseHasRentSteps" HeaderStyle-Width="120px">

</telerik:GridCheckBoxColumn>

<telerik:GridBoundColumn DataField="LeaseSupplementalDate" DataType="System.DateTime"

FilterControlAltText="Filter LeaseSupplementalDate column" HeaderText="LeaseSupplementalDate"

SortExpression="LeaseSupplementalDate" UniqueName="LeaseSupplementalDate" DataFormatString="{0:MM/dd/yyyy}"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeaseULIDescription" FilterControlAltText="Filter LeaseULIDescription column"

HeaderText="LeaseULIDescription" SortExpression="LeaseULIDescription" UniqueName="LeaseULIDescription"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeasedSF" DataType="System.Int32" FilterControlAltText="Filter LeasedSF column"

HeaderText="LeasedSF" SortExpression="LeasedSF" UniqueName="LeasedSF" HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="LeasingAgent" FilterControlAltText="Filter LeasingAgent column"

HeaderText="LeasingAgent" SortExpression="LeasingAgent" UniqueName="LeasingAgent"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="ParentTenantName" FilterControlAltText="Filter ParentTenantName column"

HeaderText="ParentTenantName" SortExpression="ParentTenantName" UniqueName="ParentTenantName"

HeaderStyle-Width="120px">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="PropertyManager" FilterControlAltText="Filter PropertyManager column"

HeaderText="PropertyManager" SortExpression="PropertyManager" UniqueName="PropertyManager"

HeaderStyle-Width="120px">

<FilterTemplate>

<telerik:RadComboBox ID="RadComboBoxPropertyManager" DataSourceID="dsPM" DataTextField="Text"

DataValueField="Value" Height="200px" AppendDataBoundItems="true" SelectedValue='<%# ((GridItem)Container).OwnerTableView.GetColumn("PropertyManager").CurrentFilterValue %>'

runat="server" OnClientSelectedIndexChanged="PMChanged">

<Items>

<telerik:RadComboBoxItem Text="All" />

</Items>

</telerik:RadComboBox>

<telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">

<script type="text/javascript">

function PMChanged(sender, args) {

var tableView = $find("<%# ((GridItem)Container).OwnerTableView.ClientID %>");

tableView.filter("PropertyManager", args.get_item().get_value(), "EqualTo");

}

</script>

</telerik:RadScriptBlock>

</FilterTemplate>

</telerik:GridBoundColumn>

</Columns>

</MasterTableView>

<PagerStyle AlwaysVisible="True" />

<FilterMenu EnableImageSprites="False">

</FilterMenu>

<HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Default">

</HeaderContextMenu>

</telerik:RadGrid>

Grid

answered on 28 Jul 2011

10 answers

213 views

RadScriptManager conflict with Obout ?

Hi, I get the error below when using RadScriptManager with Obout Show from www.obout.com. Is there a way to fix this ?

Object reference not set to an instance of an object

General Discussions

answered on 28 Jul 2011

3 answers

109 views

Get incerted row cell on client side

This is how I get cell value from edited row on client side (function attached onBlur):

function estCost(sender, args) {

var grid = $find('<%= rg_OpenWIP.ClientID %>');

var idx = grid._editIndexes[0];

var masterTable = grid.get_masterTableView();

var items = masterTable.get_dataItems();

var estCost = parseFloat(items[idx]._element.cells[5].getElementsByTagName('input')[1].value);

...

}

Now I need same for inserted row while editing. How?

Grid

answered on 28 Jul 2011

6 answers

106 views

Treeview in Combobox

I've had a RadTreeview working inside a Radcombobox, and I pre select the tree nodes based on the last value selected using. This has stopped woring since I upgraded to the latest version of the controls.

Has anyone else noticed this?

Andy

ComboBox

answered on 28 Jul 2011

4 answers

160 views

Grid, paging and postback

Hello all

I am using a radgrid with a pager :

<telerik:RadGrid ID="ResultsGrid" runat="server" AllowPaging="True" AllowSorting="True" OnSortCommand="RadGrid_SortCommand" EnableViewState="true"

AutoGenerateColumns="False" GridLines="None" ShowHeader="true"

PageSize="7" OnItemCommand="HandleDoubleclick" Width="99%">

<MasterTableView DataKeyNames="Id,Abstract,InternalId" CanRetrieveAllData="false">

<Columns>

[...]

Then in the UI, when the user clicks on a page number, there is a postback (as it seems) that makes the user wait for the reloading (which is fine); but when he clicks on the button "Next page" or "Previous page", there is not this postback ... so we have the feeling that nothing happened for 1 or 2 sec. and then the page changes.
How can I have the same behavior as for when we click on the page numbers ?
Thanks for your help,
Sylvain

Grid

answered on 28 Jul 2011

7 answers

64 views

Empty Item Feature Request

Checking in on this request....is it in Q2 by any chance?

Property of something like "InsertEmptyItemOnDataBind"...so I wouldn't have to keep handling OnDataBound to add a empty\null item to the top of the list in every combobox?

ComboBox