Could someone please pin point me to what i'm doing wrong?
Basically all i need to is get the text from my property but for some reason it always returns as null.
protected void Page_Load(object sender, EventArgs e)
{
orderId.Text = "4567";
}
protected void UpdateOrder(object sender, EventArgs e)
{
var getOrderId = orderId.Text; //always returns null here
}
front end:
<p>
<asp:Label ID="label8" runat="server" AssociatedControlID="orderId"> Order Id: </asp:Label>
<asp:Literal ID="orderId" runat="server"></asp:Literal>
</p> << the orderId is displayed in the browser
<asp:Button ID="updateBtn" runat="server" Text="Update" OnClick="UpdateOrder"/>
What am i doing wrong?
Have you got a control somewhere else on your page called order?
Your literal is called orderId
You're pulling a value from something called order.
Try:-
protected void UpdateOrder(object sender, EventArgs e)
{
var getOrderId = orderId.Text; //always returns null here
}
The problem was that I had
EnableViewState="false"
at the top of my page. I removed it and boom it works
Related
I have the following declarative in an ascx which displays a 4 column list of file names. The file names are xlxs files that can be downloaded so the command event is called when the file name is clicked.
<asp:DataList runat="server" ID="dlHistoricalRates" RepeatColumns="4" >
<HeaderStyle>
</HeaderStyle>
<HeaderTemplate>
<span>Historial Rates</span>
</HeaderTemplate>
<ItemTemplate>
<asp:LinkButton id="historicalRate" ClientIDMode="Static"
runat="server" CommandArgument='<%# Eval("filename") %>'
CommandName="Download" OnCommand="historicalRate_OnCommand" >
<%# Eval("filename") %>
</asp:LinkButton>
</ItemTemplate>
</asp:DataList>
The code-behind command code:
protected void historicalRate_OnCommand(object sender, CommandEventArgs e)
{
if (e.CommandName == "Download")
{
if (e.CommandArgument != null)
{
historicalRate_Download(e.CommandArgument.ToString());
}
}
}
But the CommandArgument is an empty string when it should be the file name. I know the express Eval() is working as it display the file names in the control.
Why, is the filename not being passed as the CommandArgument?
Your CommandArgument looks fine but another way for getting LinkButton's arg from sender object:
protected void historicalRate_OnCommand(object sender, CommandEventArgs e)
{
// get the reference of clicked LinkButton
LinkButton lb = sender as LinkButton;
string cmd = lb.CommandName;
string arg = lb.CommandArgument;
if (cmd == "Download")
{
if (arg != null)
{
historicalRate_Download(arg);
}
}
}
I have a div with its own id in the ItemTemplate of a GridTemplateColumn of a RadGrid.
How can I access this div from the code behind?
If it was a div in the web page I could access it just by typing its id but this method does not work now that it is nested inside the grid.
Please use this example.
in Aspx page
<telerik:GridTemplateColumn>
<ItemTemplate>
<div id="divlayer" runat="server">
Hello
</div>
</ItemTemplate>
</telerik:GridTemplateColumn>
In CS
protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
if (e.Item is GridDataItem)
{
GridDataItem item = (GridDataItem)e.Item;
HtmlGenericControl container = (HtmlGenericControl)item.FindControl("divlayer");
}
}
Hope it might help you..
I have a peculiar problem and I am not sure if anyone had come across this problem earlier. however the issue goes like this..
I have a grid with combination of TemplateColumns and BoundColumns and when I filter the grid using the filters under template columns I can see the results in UI (grid) but when I do the same in BoundColumns I do not see any results.. !!!
Funny thing is I can see the output from the query and its returns the correct number of results from DB. and its also assigned to the GridDataSource in the NeedDataSource event. however I cannot find the GridDataItem in the ItemDataBoundItem, I can fetch only headeritem, filteritem and footeritem.
It shows "No records to display" even when there are lot of records assigned to the DataSource.
Here I am attaching the screenshot, where you can see that the records count is displayed but not the records.. !!
Any help is highly appreciated.
here is the code sample
<ps:MassApprovalAjaxPanel runat="server" ID="m_UIRadAjaxPanel" LoadingPanelID="m_UIAsynBindLoadPanelInMasterPage">
<ps:MassApprovalRadGrid
runat="server"
ID="m_UIListingGrid"
SkinID="Grid_MassApproval"
OnNeedDataSource="ListingGrid_NeedDataSource"
OnItemDataBound="ListingGrid_ItemDataBound"
AllowFilteringByColumn="true"
EnableViewState="true">
<MasterTableView
DataKeyNames="CardID, WeekEnding, ClientPONumber"
ShowFooter="true">
<Columns>
<ps:NumericTextBoxTemplateColumn
UniqueName="CardID"
Width="70"
RelativeWidthRatio="90">
<ItemTemplate>
<asp:Label
runat="server"
Text='<%# string.Format("{0}/{1}", Eval(Constants.CARD_ID), Eval(Constants.VERSION)) %>' />
</ItemTemplate>
</ps:NumericTextBoxTemplateColumn>
<ps:TextBoxBoundColumn
UniqueName="ClientPONumber"
DataField="ClientPONumber"
Width="60"
RelativeWidthRatio="80" />
<telerik:GridClientSelectColumn UniqueName="SelectAll" HeaderText="All" />
</Columns>
</MasterTableView>
</ps:MassApprovalRadGrid>
</ps:MassApprovalAjaxPanel>
protected void ListingGrid_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
m_UIListingGrid.DataSource = RadGridUtilUI.MassApprovalResultsGet();
}
protected void ListingGrid_ItemDataBound(object sender, GridItemEventArgs e)
{
GridDataItem gridDataItem = e.Item as GridDataItem;
if (gridDataItem != null)
{
AddClientScripts(gridDataItem);
}
}
Thanks,
Preetham.
I found fix for this issue, it was quite simple and straight forward but we did not notice it.
protected void ListingGrid_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
m_UIListingGrid.MasterTableView.FilterExpression = string.Empty;
m_UIListingGrid.DataSource = RadGridUtilUI.MassApprovalResultsGet();
}
Telerik has two types of filtering which is inbuilt filtering and user defined filtering that we do it through our SP's and Code. so we always have to set the filter value to null before doing our custom filtering.
Mark this as answer.
Thanks,
Preetham.
When I click button "Button1" after the first time, the repeater's child controls will lose data in the viewstate. I added a watch on this.ChildControlsCreated. It is always true. This variable should initially be false.
The test code:
/////////////////////CustomRepeater.cs/////////////////////
public class CustomRepeater : Repeater
{
protected override void OnInit(EventArgs e)
{
base.OnInit(e); **// Sets a breakpoint here**
}
}
/////////////////////TestCustomRepeater.aspx/////////////////////
<table>
<cc1:CustomRepeater id="Control1" runat="server">
<ItemTemplate>
<tr><td><%# DataBinder.Eval(Container.DataItem) %></td></tr>
</ItemTemplate>
</cc1:CustomRepeater>
</table>
<asp:Button id="Button1" runat="server" OnClick="Button1_OnClick"></asp:Button>
/////////////////////TestCustomRepeater.aspx.cs/////////////////////
Page_load()
{
if (!IsPostBack)
{
ArrayList dataSource = new ArrayList();
dataSource.Add("a");
dataSource.Add("b");
this.Control1.DataSource = dataSource;
this.Control1.DataBind();
}
}
protect void Button1_OnClick(object sender, EventArgs e)
{
// Nothing to do, just to trigger a POSTBACK
}
You will need to re-bind the Repeater after your postback. You can do it inside the method Button1_OnClick
I have a repeater that contains a Telerik RadComboBox:
<asp:Repeater ID="rpt" runat="server">
<ItemTemplate>
<telerik:RadComboBox ID="rcb" runat="server" EnableLoadOnDemand="true"
AllowCustomText="true" ItemRequestTimeout="1000"
NumberOfItems="10" MarkFirstMatch="false">
</telerik:RadComboBox>
</ItemTemplate>
</asp:Repeater>
In the ItemDataBound event of the Repeater, I am wiring up the ItemsRequested event like this:
private void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e) {
RadComboBox rcb = (RadComboBox)e.Item.FindControl("rcb");
rcb.ItemsRequested += rcb_ItemsRequested;
}
private void rcb_ItemsRequested(object o, RadComboBoxItemsRequestedEventArgs e) {
// Database call to load items occurs here.
// As configured, this method is never called.
}
Currently, the server-side rcb_ItemsRequested method is never called. I suspect that wiring the ItemsRequested event in the ItemDataBound is problematic, but the problem may lie elsewhere.
Any ideas on how to use the Telerik RadComboBox within a repeater properly?
Have you tried putting the event handler wiring in the markup rather than adding it dynamically?
Also - you are probably aware, but just in case - ItemsRequested is an event that only fires under certain conditions. To quote the docs:
The ItemsRequested event occurs when the EnabledLoadOnDemand property is True and the user types text into the input field or clicks on the drop-down toggle image when the list is empty. - Reference
Does your scenario match the above?
EDIT:
I've tested some code. The following works (The ItemsRequested Event fires for the all ComboBoxes and adds the three test items to the dropdown on the fly..):
Markup:
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:Repeater ID="rpt" runat="server" OnItemDataBound="rpt_ItemDataBound">
<ItemTemplate>
<br />
<telerik:RadComboBox ID="rcb" runat="server" EnableLoadOnDemand="true" AllowCustomText="true"
ItemRequestTimeout="1000" NumberOfItems="10" MarkFirstMatch="false" />
</ItemTemplate>
</asp:Repeater>
</form>
code behind:
protected void Page_Load(object sender, EventArgs e)
{
List<string> data = new List<string>();
data.Add("Item 1");
data.Add("Item 2");
//add some items to the repeater to force it to bind and repeat..
rpt.DataSource = data;
rpt.DataBind();
}
protected void rpt_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
//wire the event
RadComboBox rcb = (RadComboBox)e.Item.FindControl("rcb");
rcb.ItemsRequested += rcb_ItemsRequested;
}
protected void rcb_ItemsRequested(object sender, RadComboBoxItemsRequestedEventArgs e)
{
//add the items when requested.
(sender as RadComboBox).Items.Add(new RadComboBoxItem("Item1", "1"));
(sender as RadComboBox).Items.Add(new RadComboBoxItem("Item2", "2"));
(sender as RadComboBox).Items.Add(new RadComboBoxItem("Item3", "3"));
}