Custom Server Controls :: Original GridView Templates Are Not Visible When Extended?
Jan 5, 2010
I extended gridview control to add some new features and it is working fine. However, when i come to asp.net page and add the control declaratively, the templates of the parent control that is GridView are not visible.
I declare like following and then i cannot see all templates provided by GridVeiw itself such Columns, HeaderTemplate etc .
<MyGrid:GridViewList>
</MyGrid:GridViewList>
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Oct 20, 2010
I have custom gridview that inherit from the regular gridview.
On of the features is that is has a built in page size dropdown in an extra header row.
Another feature is that this extra header row has a place holder where aditional controls can be added but here is where I have some problems.
When I add a control that is created outside the gridview to the gridviews builtin placeholder and tries to do anything that performs a postback the gridview dissepears, but appears again on a new post back.
Here is the code for the gridview:
[Code]....
And this is the way it is used in a usercontrol on page, the gridview is called gvList and the control that I try to add to its placeholder is the phrExtraHeaderControls:
[Code]....
What can be wrong, is the viewstate messed up in the postback so that the gridview can't be rendered?
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Mar 22, 2010
Using VS2005, VB code behind,
I am extending the GridView control to include a custom pager for a custom paging scheme (only one page returned from the database at a time rather than all records). In my testing a discovered an issue - on my last page of data, the GridView's rows property always returns a collection of PageSize page, rather than the actual number of records on the page, with non-data fill records being empty rows.
For example, suppose I have 23 records in my database. Assuming a PageSize of 10, when I page to the last page of data the gridview it properly displays the last 3 recrods - but when I handle the GridView's CommandName="Select" event the GridView's Rows collection contains 10 records, the last seven of which are empty.
I set a break point in just before I call GridView.DataBind and verified that the DataTable used as the DataSource for the last page of data does in fact only contain the 3 expected records. But when I set a breakpoint on the Sub that handles the "Select" GridView command, the GridView.rows collection contains 10 records, the last 7 of which are empty.
This post[URL] and comments make note of the issue but the solution prescribed by the author does not seem to work.
Attached are some snippets of my extended GridView and the two methods from my page where I mentioned setting breakpoints above.
Snippets from my extended GrdiView
[Code]....
MyReport.aspx.vb:
[Code]....
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Mar 7, 2011
I have been trying to implement an extended GridView that eventually will include a panel with a number of filter options outside of the grid iteself.
As a test I have added a dropdownlist and a linkbutton but when these are rendered to the page they are rendered as plain HTML with none of the javascript or ids that are generated for server controls as a consequence the postback event is not fired when a dropdownlist item changes and the linkbutton is rendered as plain text.
[Code]....
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Oct 21, 2010
I extended an ImageButton control and its image is changing as expected, but its OnClick is not firing.
[Code]....
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Dec 7, 2010
I need a way to define a template that the control should render before each item..I currentky have the following code:
[Code]....
But Im kind of unsure about where to place the following code:
[Code]....
Since I whould like the template defined in the BeforeItemTemplate to always get added before the actual Item/<asp:MenuItem>..so I can add elements before and after each MenuItem..
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Feb 1, 2011
i am using two tables for salary components like bonus,hra,ta,da.one is salary lookup table for viewing which components are chosen and according to this salary table is created dynamically.i want to view data fields of salary table in gridview and update thier value.
now problem is that how to create template field and edit template field for updating fields of salary table because field of the salary table changing every time as it is creating dynamically.
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Jan 25, 2011
I'm new to .NET. I'm trying to create a button dynamically with event by original button. The original button's click event response creates a button. The new button has a click event attached with a test message.What I have to do is onclick change background color of dynamically created button and grab id value to delete when button delete is clicked. Unfortunately, when I click the dynamically attached button, nothing happens.
[Code].....
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Mar 11, 2011
In ASP .NET 2.0, I've created a user control which is meant to work as a dropdown or popup by using an <input type="button" id="btnTogglePopup" runat="server" style="display:inline"... /> and <div id="divPopup" runat="server" style="display:none" ... /> the rest of the controls are contained inside this div, and they do mantain their values between posts, etc. This button 'runs at server' but it's not intended to post back or submit.It just toggles the popup (div) visible/hidden using Javascript client code by setting the div's style display property to "none" or "block" The problem I'm having is that when a page containing this control posts back, the state visible/hidden of the div is not maintained. If the user had the popup open, after the postback, it will display closed.I've read a bunch by now about ViewState & ControlState, and have the save and load contol state methods working, but when I step thru them they load old values (setting the popup to hidden all the time),and the popup doesn't work! I've come to think that b/c when the button is clicked,the visible state of the div is changed in client code w/o a postback, maybe I have to maintain this state info in a hidden fiel or something like that?At the same time I don't want to have a hidden field if it's unnecessary,and I may just doing something wrong.
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Nov 27, 2010
I have created a custom control that implements Templates (based on Panel controls) ... I can do a FindControl to locate imbedded controls. This allows me to get and set values in the imbedded controls, but I want to be able to reference the imbedded controls like they are properties of the associated panel. Here is a sample of how my custom control now works:
<cc:CustomControl ID="myCustomControl" runat="server">
<PanelTemplate>
<asp:TextBox ID="myTextBox" runat="server"></asp:TextBox>
</PanelTemplate>
</cc:CustomControl>
I can do the following (where my custom control has given the panel hosting the template the name "myPanel"):
Dim txt As TextBox = myCustomControl.myPanel.FindControl("myTextBox")
txt.Text = "Some text to put in TextBox"
What I want to do is:
myCustomControl.myPanel.myTextBox.Text = "Some text to put in TextBox"
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Oct 22, 2010
I want to create a custom control where I define several specifically named DIV sections. The code-behind logic of the custom control will perform operations on these named DIV sections. The page where the custom control is hosted needs to be able to add named controls to the DIV sections and perform operations on these named controls added to the DIV sections.
Let me explain a little further. In the custom control, I want to have code behind logic that fires the following Page Event and uses a condition to make one or another specifically named DIV section visible or not:
< _
ToolboxData("<{0}:BaseDetails runat=""server""></{0}:BaseDetails>") _
> _
Public Class BaseDetails
[code]...
how can I create a custom control which is able to generate the named DIV sections "DetailsNameDiv1" and "DetailsNameDiv2" where my custom control can check a condition and make one or the other visible. Also, I need to be able to add controls to these named DIV sections when I host the custom control and the control that I add to the named DIV section needs to let me set values of these controls from the code behind logic of the page (or usercontrol) where the custom control is being hosted (in my example, I am adding TextBox controls that I want to set the Text property from a SQL Data Reader).
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May 20, 2010
I have a gridview that is bound to a SQL datasource and is filtered via FilterExpression,
the FilterExpressoin is using Contro Parameters in a for of textboxes.
I want a certain button to become visible (btnInsert.Visible=true) when the filterExpression returns no results.
what event should I use? what is the code for that?
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Mar 16, 2010
Using VS2005, VB code behind, Using Customer Pager Template, in a custom GridView...
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Aug 18, 2010
i've created a webform with one gridview having connected with the database using datasource. i.e password database with three colomn .
now want to insert the custom dropdown button using server control for each column.
when i select the dropdown list the list should display the value as required.
e.g if i click the uname dropdownlist then it should show the list of names.
if i click on pwd dropdownlist then it should show the list of numbers.
if i select any one of the value in the dropdown list then it should insert into the
database.
can i get code on this type of question...?
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Mar 5, 2010
Why custom Gridview control not render html properlies under <Columns> properly in Visual Studio 2005?
For example:
[code]....
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May 19, 2010
I have existing project written by someone else that utilizes custom User Control that among other things contains a GridView control.I'm working on implementing the bulk-edit function so that users can modify data in many rows at once and then update the database accordingly.My problem is that in all examples that I see in order to implement this functionality you need to Override the CreateRow method, at which point you are able to put it in Edit State. The issue is that since my custom control inherits from User Control and not from GridView this protected method is not available. If I change the inheritance to GridView, tons of other things break inside this code, so I'd like to avoid that.My question is, is there anyway to still override the CreateRow if I'm inheriting from UserControl class and not GridView.If this is not very clear, please let me know and I'll try to explain further. I really need help with this, as it is time sensitive and it's always hard to work with someone elses code,
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Mar 31, 2010
i am working on an asp.net mvc 2 web app and inside my model i would like to include a field named "" that has the values "Male" and "Female". I would like to use custom templates and Data Annotations in order to take advantage of model metadata. Specifically, i would like to create one DisplayTemplate (displaying the value) and one EditorTemplate (displaying a dropdown list) for the "Sex" type field.
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Aug 15, 2010
I have a collapsible panel on my page that has been working up until yesterday. I have no idea what changed, however, it is no giving me the following error.
Microsoft Jscript runtime error: 'Sys.Extended.UI' is null or not an object.
Below is the code for the Collapsible Panel, however, I don't think it has anything to do with it since it has always been working.
<asp:CollapsiblePanelExtender
ID="cpeStandardInformation"
runat="Server"
TargetControlID="pnlCreate"
ExpandControlID="imgStandardInformation"
CollapseControlID="imgStandardInformation"
Collapsed="False"
ExpandedImage="~/images/Minus-Green-Button.png"
CollapsedImage="~/images/Add-Green-Button.png"
SuppressPostBack="true"
ImageControlID="imgStandardInformation"
/>
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Jan 3, 2011
Hope this is the correct forum for this question. I am using VWD 2010 an have a web project and get the following error upon execution:
Parser Error Message: Unknown server tag 'custom:AjaxValidator'.
My code is as follows in the .cs file:
[Code]....
[Code]....
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Jan 24, 2011
I've extended gridview, and added it a linkbutton, when i have'nt select a datasoruce for gridview the linkbutton causes postback and onclick fires, however when i select a datasource for grdiview the linkbutton does'nt cause postback. I've also test onclientclick property and href attribute and assigned them page.getpostbackevent, and they did'nt work here is my code:
[Code]....
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Dec 24, 2010
here's a situation and I would appreciate your response.
I have programmatically created the Wizard control:
Page_Load(obj s, evargs e)
{
Wizard ClaimDetailWizard = new Wizard();
foreach(int item in selectedItems)
{
//create new step
//added custom control to new step
//add step to wizard
}
//added wizard to a placeholder on a page
}
Based on List I get from Session i added new steps to my wizard To each step I had added a custom control
Each custom control in tern contains another custom Gridview Control in it.
So here's the problem when the page loads for example for two steps. All is good Wizard does what it's supposed to do.
But when I try to use sorting or paging in that custom Gridview. Somehow it displays the gridview I should see in the next step of the wizard.
Also what I'm noticing through debugging. Is that when I press next in the wizard I go back to the original page where I do all of the code specified above, and it recreates the wizzard. But it goes to the next step. Is this the way wizard supposed to work? Just doesn't seem very efficient.
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Jun 29, 2010
I am new to sharepoint I am familiar with creating webparts and using them in sharepoint, but how to create an entire site as template and make it to use in another sites
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Mar 30, 2010
If I wanted to create a custom HTML helper and take advantage of the new in-built templating feature, how would I do that? It appears the templating features are internal?
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Apr 4, 2010
I have a custom server control inheriting from CompositeControl. It consists of two RadioButtonlist controls that are rendered side by side in an html table. The number of ListItems in each RadioButtonList is not known until runtime. Depending on how many items each list contains, the RepeatColumns property of each list is set differently. To do this in the handler for the ItemDataBound event I need to get the count of ListItems in each RadioButtonList. How do I expose the Items.Count property of each internal RadioButtonList as a top-level property? I tried using a getter to return the count but this generates a compile-time error to the effect that the count cannot be assigned to--even though I have not created a setter.
Similarly, in the handler for the Submit event, I need to get the ClientID of each internal RadioButtonList to pass to a method that checks for data changes. How do I expose the ClientID of each component RadioButtonList as a top-level property?
I can of course index the Controls collection of the composite control to access the child control and read its properties--but that defeats the whole point of making a complex, independent custom server control.
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Sep 2, 2010
I'm finding my self with the problem that if I do not show the Template for a "complex" object I have in the main view object I still get the errors in the summary. How do i get around this?
I've got a model with say:
->Persons (has its own editor template)
->Pets(has its own editor template)
In the create view I show each one depending if they are not null. But when I try to validate HouseType and say I have Persons not null and pets is null. I get errors of validation for pets.
How do I get around this?
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