IDE :: [ASP.NET] FormParameter/ControlParameter Empty When Using Web User Control
Jan 14, 2011
I'm building a live search inside our web application. But now i have a problem with a Web User Control where i can`t find a solution for.
I`m creating a User Control Search which later will be used for a default live search. Now i have created the solution inside a ASPX page without a user control. This works fine. But when i replace the code into a ASCX file (User Control) the input inside the textfield could not be found. No exception but the input of the function is nothing.
how to get the controlparameter or formparamter to work inside a user control? I already have tried things like ClientID this results into a exception (control not found). The fieldname with the $ instead of the _, this results into the input is nothing.
[Code].....
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Jan 31, 2012
My page has a DetailsView that has a hidden field in it that gets referenced by an SQLDataSource to populate a different field in the same DetailsView. I cannot get the codebehind to find the Control, no matter how many different ways I try. I really need to be able to show the TEXT field which is associated with the dsPicklist SqlDataSource. I have marked the code that is causing problems.
<asp:Label ID="Label1" runat="server" Text="Select Survey:"></asp:Label>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
DataSourceID="dsSurvey" DataTextField="SurveyName" DataValueField="SurveyID">
</asp:DropDownList>
[Code].....
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Apr 7, 2010
im tryin to link the 2 pages to each another, 1st, when i click on the View hyperlink in the product page, its supposed to lead me to the product view page, with the product chosen being displayed. Ive searched the net, and well, ive found some solution on this, but most of them were to update the statements, for my case it would be just to lead from the product page to the product view page. But everytime i press the view link, it leads to an error.
The source code is as below
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="productid"
DataSourceID="SqlDataSource1">
[Code].....
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Jun 10, 2012
I am trying to display an usercontrol(has several panels one on top of the other panel) on tabpage. I am using below code to achieve this.
[Code]...
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Nov 6, 2009
I have an application going here Form1 has a panel on it named TargetPnl. I need my TargetPnl to display my user control named Vviewer when I click my SearchBtn and also need it to disappear when I click another button.
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Apr 11, 2009
how can i call a VB function - deleteevent() in usercontrol.ascx.vb from a javascript function in clickhandler(e) in usercontrol.ascx. The call should cause a postback because I need the usercontrol to display the changes.I am currently trying to do it by using a linkbutton with style display:none, and calling its click event from the javascript function. But i dunno how to call the click event.
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Oct 17, 2011
I have an aspx page that has two different user controls. I want to find user control A and be able to set properties, etc., from user control B.
I was thinking I could do something like this:
Dim CMFilters As Control = Me.Parent.FindControl("CMFilters")
...but that doesnt work to be able to set properties and call methods. I somehow need to get the user control and and declare it as that user control type.
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Sep 13, 2007
Somehow the User.Config file was corrupted for an instance of my VB .NET app. When access one of my user level config property (My.Settings.MyProp) I get the a ConfigurationErrorsException with the message "Configuration system failed to initialize." I looked at the User.Config file and found that it is empty, it can be opened but there is no XML text contained within.I would like to programmatically fix the file if an exception is seen. When I attempt to use any of my user level properties, I continue to get the same exception. I've tried calling the Reset() but that yeilds the same exception. I then tried Save() to see if it would write out a default version, but it appears to do nothing (the file is not updated). My.Settings appears to be useless at this point.How can I reinitialize the User.Config file to the default config settings without deleting the old file? I would think that there should be some mechanism for restoring this file back to its default. And how can I update/reinitialize the My.Settings instance so that I can access the properties normally?
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Jan 26, 2011
What conditional statement is used to identify if username.text is empty or password.text is empty or both is empty then prompt a msgbox that tells what part is empty. My attempt was bad and my first time to use select case. [code]
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Dec 22, 2010
In a user control I have the code shown below.
I now realize that it is incorrect because the container's InitializeComponent property initializations have not run yet and they must be run prior to Refresh being called.
How (where) can I run Refreash after the container has initialized this user control.[cod]e...
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Aug 31, 2009
i am using vb.net 2005 to developed desktop application I am having two windows form user control , the first control name con.vb containing the design and code for connecting to database and getting a list of my project values in combo box.
Now the second user control report.vb which i am using to generate some reports , since the code behind is using connection to connect to various project database , so i want to get the value of
First user control into another how i can get the i have tried the below but its giving me error in run time but no error in design or code behind -
MR.MainForm.Connection1.project_combobox.SelectedV alue.ToString
Error i am getting is :
System.NullReferenceException was unhandled
Message="Object reference not set to an instance of an object."
Source="MDR"
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Apr 19, 2012
I am trying to prevent the User from proceeding if a specific text box is empty. All of the following lines of code SEEM TO work:
If txtTitle.text = "" Then.....
If txtTitle.Text = Nothing Then.....
If txtTitle.text = Nothing Then.....
(followed by a message box advising of the need for input)
The problem is, if the User enters a space (either accidentally or intentionally) all three of the above recognize the space as a valid entry.
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Mar 17, 2010
I have an application where I have different picture boxes which the user can drag and move.I also have different empty pictureboxes.
What I want to do:I want to let the user be able to drag a picturebox to one of the empty pictureboxes. Also, If the user drags a picturebox to an invalid place (outside the bounds of any of the empty pictureboxes), the dragged picture box should return to its previous location.
So what I currently have is the usual drag-drop code and on the MouseUp event, I run this code (currently only checking for one empty picturebox):
If Not pbEmpty1.Bounds.Contains(Me.PointToClient(pbRemote.Location)) Then
pbRemote.Location = OldLocation
End If
(pbEmpty1 = Empty picturebox, pbRemote = picturebox that is dragged)
But it doesn't work, it doesn't care if the picturebox is inside the bounds of the empty picturebox or not, it still returns to its previous location...
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Jun 22, 2010
I have textbox that is empty and where the cursor is flashing and I wish to move to other textboxes.What happens is that the error message is displayed first and when I press OK, only then can I move to the other textboxes. How do I stop this happening. Am I missing some code.
DesterateDan
Private Sub salesInput_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles salesInput.Validating
[code]....
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Sep 9, 2011
what is code i should use if i want to prevent user not to leave empty word in text box after user click save button.Oh ya, i am using visual studio 2005, databse sql 2005 .Here is my code
Private Sub btnregister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnregister.Click
If MsgBox(" Are You Confirm", MsgBoxStyle.YesNo) = vbYes Then
[Code].....
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Apr 16, 2011
How can I set a datagridview control to not add a new empty row when I add an entry?
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Aug 10, 2011
what is code i should use if i want to prevent user not to leave empty word in text box after user click save button. i am using visual studio 2005, database sql 2005.
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Mar 27, 2009
I am trying to build a tournament bracket application. In order to build the application efficiently I would like to make a user control "GameControl" that represents a game and give it attributes that represent the names of the competitors "TeamNameA" and "TeamNameB" ,an attribute "Winner" to represent which team should move on, and an attribute "NextRoundGame" that assigns another instance of the user control so that it can assign the "winner" to one of the "TeamName" attributes of the next round in the competition. If the controls were native to VB I feel like I could do it easily (I have only spent about 30 hours self teaching/tutorial following) but I can't seem to find out how to pass values to custom attributes of custom user controls through code.
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Feb 11, 2011
I am creating a form for work where managers can report when they find a customer's personal information laying around on a desk (we work at a call center where agents answer calls for a wireless cell phone provider, so we take personal information security very seriously). Anyway, I am wondering if there is a way to have a text box autofill with that manager's windows username (since they will need to be logged into their own profile to use the form).
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Jun 2, 2012
i have a windows from project and in that project i created a user control lets call itcustombutton1 now i can use that control quite easily either at design time or runtime by creating a new instance of it like
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Nov 2, 2011
Everywhere in this picture you see a blank item, or empty space, a control has failed to draw of something. In this case they are all textboxes.
picture:
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Sep 16, 2010
I have created three user controls, which will be used on the various forms in my program. However, I need the buttons on one to call the other two.
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Dec 22, 2011
I am upgrading user control from vb6 to vb.net.In the vb6 application I am loading 3000 labels using a label control array.In vb.net I am doing same but it's taking too much time to load.In vb6 it's taking 1-2 seconds, but in vb.net it's taking 30-40 seconds for same work. Why does it take too much time in vb.net for same work?Code is given below, here Led is the label control array.
For l = 1 To 3000
Led.Load(ledCounter)
ColLed.Add(Led(ledCounter))
[code]....
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Jul 22, 2010
I am checking for empty string values, but how do i see for the Quantity text box if the user chose only numerical values after the empty string. For example...
[Code]...
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Dec 19, 2009
I am trying to use the Web Browser control in my vb .net user control. I am using VS 2008. Finally, I will be calling my assembly (.dll) from a web page. I wanted to display the usercontrol with the web browser control inside this web page. The problem is I cannot proceed since the Web browser control cannot be called from a partially trusted assembly. Using VS 2008 I have created a strong name for my class, also added the <Assembly: AllowPartiallyTrustedCallers()> to the AssemblyInfo. But still the web browser control cannot be seen in my web page. Do you how I can make my assembly fully trusted so that it can access web browser control? If you have used web browser control, can you confirm if this step is really required?!
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Feb 12, 2009
I Need Build a user control which works as a Login control using Windows Class Library or Component Template:The user control returns the user name and the password It means that the control has minimum two ReadOnly Property procedures. You let the user of your control (he/she which uses your control in his/her software) to set the background colour of the two labels. Create a Windows application to test your control.
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Feb 28, 2011
I tried it and get an error but maybe I'm tring the wrong way. Can a usercontrol inherate an application defined class ie.. could you inheritance a classic rect class into a user control to add the hight and width properties to the control without having to do all the coding all over again? Currently I just declair a private instance of the class within the control and then encapsalate. It would be nice if I could just inherit all the functionality of my classes into controls designed to implament the classes.
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Jan 5, 2011
The code is listed below which hopefully illustrates what I'm trying to do:[code]....
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Feb 12, 2011
I have an asp.net usercontrol which represents a "popup" dialog. Basically, it's a wrapper for the jQuery UI dialog which can be subclassed to easily make dialogs. As part of this control, I need to inject a div into the page the control is used on, either at the very top or very bottom of the form so that when the popup is instantiated, it's parent is changed to this div. This allows "nested" popups without the child popup being trapped inside the parent popup.
The trouble is, I can't find a safe way to inject this div into the page. A usercontrol doesn't have a preinit event, so I can't do it there, and calling Page.Form.Controls.Add(...) in Init, Load or PreRender causes the standard exception "The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases."
I thought I had found a solution by using. ScriptManager.RegisterClientScriptBlock(Page, Me.GetType, UniqueID + "_Dialog_Div", containerDiv, False) which seemed to work well normally, but recently a coworker tried putting an UpdatePanel inside the dialog and now she's getting the error "The script tag registered for type 'ASP.controls_order_viewzips_ascx' and key 'ctl00$ContentBody$OViewZips_Dialog_Div' has invalid characters outside of the script tags: . Only properly formatted script tags can be registered."
How are you supposed to add controls to the pages control collection from inside a user control?
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Dec 30, 2011
If I need access to the value of a user control's property BEFORE PreRender, would I need to base the custom control off of one of the preexisting data controls (repeater, listview,etc.)?One of my user controls features a gridview control that is configured based on the user control's properties on which it resides. Several of the key properties alter the SQL Statement for the underlying recordsource. I'm now in a situation where the property that sets the WHERE statement for the SQL Statement needs to tied to a value in the user control's parent FormView. Think of the formview as displaying a customer detail record. The user control takes the customer's account number and then displays data from a related table such as Customer Contact Names. Since the gridview is created before the control's prerender event, working within the prerender event doesn't seem efficient.
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