Web Forms :: Inconsistent FindControl?
Mar 29, 2010
TextBox otb = (TextBox)Page.Master.FindControl("txtStatus");
otb.Text = "Test Script 1 saved";
otb.Visible = true;
I have a textbox that serves as a status panel (box) on the masterpage. I use the same code on two different content pages. On one content page, the write occurs. On another content page, the write does not occur. I even moved the code that was working into position on the erring page and it still doesn't write.
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Mar 9, 2010
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I have a form that contains times and dates. Each of these controls has a required field validator so that the user must put in the date and time. This apprears to work fine in testing. The data is stored in sql tables which are then worked with in the office using an Access Database. The webforms are simply used for gathering the data. In analyzing the data, they are finding that there are instances when no time has been stored. I don't know how the insert information could be saved if the control was blank. To make matters worse, the staff swear that they are entering the times.
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Apr 6, 2010
I'm seeing a really strange error that I'm having a difficult timetracking down. I think its related to my configuration of Rhino ESB, though I'm not sure
if RSB is actually causing it, so I figured I'd ask and see ifanyone else has come across this in any other usages of MSMQ.I'm using RSB as a client in a web app (ASP.NET, the client runs in the background). The client talks to a windows service via the MSMQ binding for RSB. Restarting the service never appears to have an effect on MSMQ, neither does restarting IIS by hand. However, whenever I actually restart the computer itself, MSMQ always refuses to start back up, claiming that a "queue is in an inconsistent state". Attempting to start MSMQ manually results in the same error, effectively rendering the MSMQ install completely useless. The only way to solve it is to actually remove then reinstall MSMQ.
The only information I've found via the almighty Google are references to a problem in MSMQ 2.0 (this problem is occurring in MSMQ 4.0). I've verified that Dispose is being called on on the bus at shutdown, in both the service and the web site.
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Feb 18, 2010
I have a code potion that runs a particular SQL and Fill the data in to a DataTable:
[Code]....
This code is working perfectly for a Query in my local machine without any error. But when I am trying to run this code in my friends machine (which is in the same network) I am getting the error 'ORA-00932: inconsistent datatypes'.I have tried to run the SQL in the database also (with the same user), but got no errors there. Could somebody please help me to get out of this problem?Here is the SQL I am running, the query is basically returning all the jobs that are being scheduled under Oracle 10g scheduler and the count of errors they have from the previous day:
[Code]....
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Jun 14, 2010
Ran into a bit of problem when using PageMethods when calling a webmethod in the code-behind. My markup page has a radgrid which gets populated via the objectdatasource.Pagemethods works and returns data as expected when the objectdatasource binds the radgrid with some data but not when the objectdatasource returns nothing, i.e. radgrid is empty. PageMethods call has got nothing to do with the objectdatasource, I'm simply using its output to build a list of checkboxes dynamically on the client side using Javascript. And this is how my code snippets looks like:Markup page:
<script type="text/javascript">
function CallGetARInvoices(src,dest)
{
[code]...
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Jan 25, 2011
I've got stuck for this for a long time. I always got empty value for the posted data. Here is my code:
Protected Function sqlparameter_insert_newscat() As SqlParameter()
Dim sqlparam(4) As SqlParameter
Dim ddlstatus As Boolean
If rbActive.Items(0).Selected = True Then
ddlstatus = True
Else
ddlstatus = False
End If
sqlparam(0) = New SqlParameter("@username", SqlDbType.VarChar, 30, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, Session("user.id"))
sqlparam(1) = New SqlParameter("@news_category", SqlDbType.VarChar, 255, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, news_category.Text)
'Response.Write(HttpContext.Current.Request.Form(name))
sqlparam(2) = New SqlParameter("@news_category_desc", SqlDbType.Text, 1000000, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, HttpUtility.HtmlEncode(news_category_desc.InnerText))
sqlparam(3) = New SqlParameter("@news_category_status", SqlDbType.Bit, 1, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, ddlstatus)
sqlparam(4) = New SqlParameter("@news_category_parent", SqlDbType.BigInt, 100, ParameterDirection.Input, False, 0, 0, "", DataRowVersion.Current, ddlRoot.SelectedValue)
Return sqlparam
End Function
the news_category.text always the empty string even the dropdownlist selected value return empty string. Is this an error of bug in Visual Studio 2010? I 've got stuck for this for long time and i have been nearer to deadline. I just made change "ValidateRequest = False" to aspx file to permit html tag to be posted.
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Oct 21, 2010
Is there a reason why i get different result when reading collections using WebConfigurationManager.GetSection method.
It sometimes returns values correctly in the Hashtable and at other times returns nothing for the same data. Its inconsistent.
client:-
Hashtable hsh = (Hashtable)WebConfigurationManager.GetSection("test1");
Config:-
<section
name="test1"
type="System.Configuration.DictionarySectionHandler"
/>
<section
name="test2"
type="System.Configuration.DictionarySectionHandler"
/>.......
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Jan 3, 2011
[Code]....
Stacked-column chart has inconsistent column segment widths
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Aug 4, 2010
I have a simple form with a list of linkbuttons, each fires the same onclick event which sets an indicator image. I have a dummy button with style="display:none" which I have set as the TargetControlID of the modal.
onClick event from the imagebutton, the modal is shown via modal.Show(). The cancel button inside the modalpopup fires an event which turns off the indicator image and hides the modal via modal.Hide().
The events fire perfectly, it's very simple! Although after doing some testing I noticed the modalpopup is not presented after the 6-10th cycle of clicking the open event, then clicking cancel. The grey background appears but it is behind the main panel and the modal is either presented behind this or is just simply not displaying.
I spent hours researching various methods, implemented the CancelControlID to see if it was somehow tied to my call of modal.Hide() that fails.This occurs with an updatepanel only. The behaviour is much cleaner this way, so I would hope to be able to implement this. I have basically eliminated everything but these two events!
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Nov 16, 2010
Create a control 'ClassName' in file ClassName.cs. Path is c:ProjectWebuserControlsControlTypeClassName.cs
[code]...
The really bizarre thing is that the error is inconsistent.Sometimes the project builds, sometimes some files break the build, sometimes others do, sometimes all of them do.
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Mar 24, 2010
I have the below linqdatasource selecting event to populate my frontend asp.net listview. How do I find a control within my listview's ItemTemplate within this event? My attempted code returns the error: "Object reference not set to an instance of an object" on code line 80? From the debugger I know that "query.UserId;" returns a value so it's my "ratingControl" reference that the debugger can't find?...
[Code]....
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Apr 15, 2010
I have a literal control on a page that gets it's value from a resource file like this...
<asp:Literal ID="Literal2" runat="server" meta:resourcekey="Literal2Resource1"></asp:Literal>
The resource file contains the following HTML code...
<a runat=server id="bylchau" href="./pothole_locator_map.aspx?lang=en-gb&lat=53.153977&lng=-3.533306">Bylchau</a>
Therefore when the page is loaded it renders a hyperlink to the page.
What I want to do, is modify the href of this hyperlink after the page has loaded (in Page_LoadComplete??)
Have tried the following but get error, 'Object reference not set to an instance of an object.'
Dim quicklink As HtmlAnchor = DirectCast(Form.FindControl("bylchau"), HtmlAnchor) quicklink.HRef = quicklink.HRef + "boo"
What I was hoping for is that the href of the anchor would change to href="./pothole_locator_map.aspx?lang=en-gb&lat=53.153977&lng=-3.533306boo"
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Feb 3, 2011
I got problem finding the Control ID in my ASP.NET page.
When I try to refer that ID, it always give me:
I am trying to refer this:
[Code]....
I pass this id from here:
[Code]....
This is my code behind which is driving me crazy :(
[Code]....
When I use label to display the STRING INTIME, IT GIVES ME "textboxCashier1In"
BUT WHEN I DO THIS:
[Code]....
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Aug 10, 2010
How do we code "findcontrol" with a third party control? I tried "TextBox" for Namespace="FreeTextBoxControls" Assembly="FreeTextBox" and it threw an error:
Object reference not set to an instance of an object.
Here is the offending line:
Dim Body As String = Convert.ToString(CType(lsvBlocks.InsertItem.FindControl("FreeTextBox"), TextBox).Text)
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Dec 14, 2010
If I use the FindControl Method on an .aspx page (without master page), it finds the desired control no problem. When I use a Master Page then it will not find it even though it exists. why is this?
[Code]....
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Jun 5, 2010
First post here, I usually try not posting until I am completely lost. I have a webform that gets a dynamic dropdownlist added to a placeholder in a method during pageload. During a submit of the page, I want to be able to get the selectedItem in the DropDownList that was also added dynamically from a DB. I know the ID of the DropDownList, and I know the Value of all the ListItems. Although when I am trying to use FindConrol(ID), and assign it to a DropDownList, the Control comes back Null and I get an error saying "Object Reference not set to and Instance of an Object", I believe because its not finding the control.
[Code]....
Can anyone show me how to use this to get access to the properties of the dynamic DropDownList properties, especially the ListItems within.
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Mar 1, 2010
I have a datalist with price label
<asp:label runat="server" ID="lblPrice" Font-Bold="true" Font-Size="Medium"> <%# DataBinder.Eval(Container.DataItem, "dProduct_price") %></asp:label>
i have used to find the control in my code but when i debug the value is null
Label price = (Label)e.Item.FindControl("lblPrice");
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Feb 1, 2011
I want to access child menuitem by name.not index number is it possible? This doesn't working
Menu menuLogin = (Menu)(LoginView1.FindControl("mLogin"));
MenuItem mi = menuLogin.FindItem("Register");
mi.text="Null Reference Exception here";
But this works:
Menu menuLogin = (Menu)(LoginView1.FindControl("mLogin"));
MenuItemCollection mic = menuLogin.Items[0].ChildItems;
MenuItem mi = mic[0]; mi.text="its OK";
I am looking something like this:
MenuItemCollection mic = menuLogin.Items[0].ChildItems;
MenuItem mi = mic["Register"];//or mic.finditem("Register") or so...
mi.text="its OK";
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May 7, 2010
I have a dynamic gridview in which i need to add textbox, checkbox, imgButton in the cell dynamically.
At the moment user click on the imbgutton, a click event fire and i need to capture the user input on the checkbox and textbox of the particular cell.
I have problem in finding out the checkbox and textbox control in the imgbutton click event. The cause is i do not know which row in the gridview i need to search to for the control.
I have try gridview.Fincontrol but fail.
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Jan 6, 2010
using the GridView FindControl.
What I've done is I've setup a Gridview with a datasource to show only 1 of the columns I need from the datasource, but I also have another ItemTemplate Column in which I have a dropdownlist with another datasource that I've bound to the dropdownlist.
What I need to do is have the dropdownlist show the selected one when compared to a id from datasource in the gridview.
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Mar 11, 2010
i have button field in grid view, basicly i want to show to in some of the row only, but i cant find the "ID" using find control
This is my aspx code
[code]....
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Jan 10, 2011
I have a aspx. site with a repeater and a HeaderTemp. in this i have this code.
[Code]....
my question is how do i in VB use the findcontrol from the aspx.vb (codebehind) so i can use the selected value in a if-then-else.
[Code]....
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Sep 22, 2010
I have a table where each cell contains an ImageButton, with an iterative ID:
[Code]....
I am then trying to assign a URL to each imagebutton dynamically in a separate code file
[Code]....
Everything compiles, but when I run this I throw a Null Reference Exception: {"Object reference not set to an instance of an object."}
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Feb 28, 2010
I have this control in my paqe:
<asp:TemplateField HeaderText="Reciprocal URL" SortExpression="ReciprocalURL" ItemStyle-Width="">
<ItemTemplate >
<a href="<%#Container.DataItem("ReciprocalURL")%>" target="_blank" title='<%#Container.DataItem("ReciprocalURL")%>'>
<%#BusinessLogic.WebSite.BreakReciprocalURL(Container.DataItem("AdvLinkID"), 40)%>
</a>
</ItemTemplate>
</asp:TemplateField>
I have a select all function and I want to use an if statement to only select items if there is something in this templatefield:
Protected Sub chkSelectAll_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles chkSelectAll.CheckedChanged
For Each itm As GridViewRow In Me.gvLink.Rows
'insert if statement here to check for linkback url. if so then enable checkbox else disble checkbox to prevent user from selecting.
CType(itm.FindControl("chkSelect"), CheckBox).Checked = CType(sender, CheckBox).Checked
Next
Me.lblMsg.Text = ""
End Sub
I would do something like the above for the checkbox, but I'm not sure how to reference the control. It's a templatefield right?
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Mar 22, 2010
In my gridview, I have an ImageButton and when the user clicks it, I show a modal, however, when I popUp modal its showing me the same Datakey value for each row, so, is there a way to use FindControl for the selected row within the RowCommand?
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