Web Forms :: Controls On Designer Surface Disappear?
Jun 7, 2010
I am using vs2010 and working on an ASP.Net Website my problem is the controls that I add to the designer surface disappear after I save and switch to code view. As shown in 'Fig1'
Fig1
Description: When I am using the designer surface, I will drag on a series of SqlDataSources and configure them. I then either save and close or just switch back to code view, if I switch back to code view the SqlDataSources do not exist but when I swtch back to designer view they are there, if I save and close then re-open the newly added control are not there.
There is an image for the surface, and a text is written on the image for 184 rows of date.. Thus, it is expected to see 184 different text written image files are generated with all the same background images. (The code is declared below...)
The problem is that the first text is written for all 184 different data.. I think I have to remove something in the loop. But what is that ??
How do you delete more than one entity at the same time in the designer Entities list. it seems that the designer interface only allows the selection of 1 entity at a time....
I am followint the insructions of this walkthrough of VS2003
[URL]
and in a part say this 8 Find the authors node and expand it to show the fields in the authors table. 9 Using CTRL+Click, select the au_id, au_lname, au_fname, and city fields. 10 Drag these fields from Server Explorer onto the design surface Now i am using VS2008
When i try to drag and drop i can not made it is maybe because of the differences between 2003 and 2008 versions
In a project of mine I dynamically create controls and add them to the nodes of a radtreeview (a control by telerik) in theLoadViewState event. By the end of this event everything seems fine, but as soon as the Page_Load event fires the controls have disappeared. No code of mine is executed during this phase. I'd love to know why this is the case,
I created a web part called 'staff phone search'. There are two controls 'Button' and 'Textbox' in it. The web part is inherited from Webcontrols webpart class not from sharepoint web part.My problem is that if I fill the search keyword text box and click the button, the text box and the button disappear. However the webpart displays result properly. Subsequently I am not able to search again because the web part never shows the controls again. How can I keep the controls after the webpart is submitted?
My code can be found below.
public class WebPart1 : System.Web.UI.WebControls.WebParts.WebPart { TextBox _myTextBox;
I have a GridView in MultiView and everything works fine. When page load everything looks good,but then when i try to edit something in my gridview it does postback and the whole gridview disappear from the multiview.
I have a gridview in which i have declared one static templatefield (with some button ctrls inside) in design itself.
I add the remaining columns to it as a dynamic templatefield by inheriting the ITemplate interface.
My problem is that now when i cause some postback for the firsttime after the Gridview is bounded, it works fine. But when i cause some postback for the second time, all the controls in the static templatefield disappears.
I have a checkbox column in a Gridview that is added in the aspx and the other columns are added in the code behind. The checkbox is a choice to print the record or not. When the print button is pushed the page posts back and the checkboxes are gone.
I have read that you have to re-add the checkboxes on postback, but where do you do that and how do you retain the viewstate values - checked/not checked? I have tried everywhere - PreInit, PreLoad, PreRender... I can't get the viewstate values to appear anywhere. The checkboxes can be added just about anywhere but the vaules are set to "unchecked" by default... no values ever come back no matter where I re-add them.
I already implemented the dynamic templatefield which will re-created in every postback. Everytime I make a postback in the page I see no problem but when I click my imagebutton inside the gridview then the dynamic templatefield disappear.
To double check if it is really gone at all I just select the second page of the gridview using my customize paging using dropdownlist outside the gridview and the templatefield with its correct data reappear again.
I already put a variable inside the rowcommand to see if the number of columns are the same with the number of columns the gridview render together with the dynamic templatefield during debugging and it is there but cannot render that templatefield in the client.
This details view is part of a Master/Details. It appears in it's modal pop up like it should when a record is selected in the grid view. But then when the edit button is clicked in the details view the details view and modal pop up disappear. Everything else works correctly. I've used this same pattern successfully for other pages with out this issue.I don't understand why this is happening. There is no event handler that is tied to this. I don't have any code that would cause this.The edit button is just using the edit command that's set declaratively in the mark up. It doesn't have any code in the code behind that would override this.code for the details view:
I am trying to put the select command in code behind:
sdsAdd.SelectCommand = String.Format("SELECT Classes.ClassId, Committed, CallNumber, SubjectArea, CourseNumber, SectionNumber, GradingBasis, NumberOfUnits, NetId FROM Classes INNER JOIN EnrollmentAdjustmentClasses ON EnrollmentAdjustmentClasses.ClassId=Classes.ClassId WHERE AllFormsId='4' AND SectionId='1' AND NetId=@NetId AND Committed='True' AND EnrollmentAdjustmentClasses.FormId={0}", Request.QueryString["FormId"].ToInteger32()); gvAdd.DataBind();
When I do that, then click edit to edit the selected item, the item disappears from my gvadd. What am I doing wrong?
I'm writing a registration form using just CSS styles and while the web page is rendered in the browser the way it should the view at design time is awful.Design time view: ttp://img340.imageshack.us/img340/1746/sshot1op.pngRendered page: http://img140.imageshack.us/img140/4989/sshot2r.pngThis is the code behind (no markup):
I have been using .NET 2.0 and VS 2005 for web application project and lately i am noticing that .designer.aspx.cs does not declare all the controls 'automatically' which r there on .aspx...i add them manually and some of them get lost,like the additional 'div' controls which i have on pages inheritated from the master,everytime i reload it.. ..i fully understand that i am not suppose to manually change anything in designer.aspx.cs but what do i do with this issue? Is .net 2.0 ,VS 2005 are too obsolate and i absolutely need to get on .net 4.0,2010..
I have a GridView attached to an ObjectDataSource (returning a DataTable) in a UserControl. The code is really simple. Data comes down fine when the page is first rendered. When I click on Select or Delete (inside TemplateFields), RowCommand is supposed to fire but it doesn't, the page goes straight to Page_Load. I literally have 0 other event handlers that are set on this control and everything else in the codebehind shouldn't even fire if it's a postback. Also on postback, the Select and Delete buttons disappear. It looks like the TemplateFields are still there but they're empty. The data fields (all of two columns) post back fine.
Should bar on the HTML designer show the tag name? It sometimes does!
Here's an image of what I referring to.
I thought for sure it must be a bug but considering that I heard that MS was rewriting the editor (designer too?) I am starting to question whether I know how to use it!
Note the "TD" tooltip on the bottom right. Shouldn't this "TD" appear on the bar on the far right where the mouse would be?
I have a Gridview with edit/delete button & in row data one field is a month value.
I want the edit/delete button in that row to disappear if the month in the row is past month.
How could I do this ? I have set the label1.text = current month but I do not know how to set the edit/delete button to be visible/invisible on the condition of the data in the row.
I'm working on building a an ASP.NET composite control that is a wrapper for a GridView object. I have been able to figure out how compose the control in order for the markup to appear correctly when added to an ASPX page. Now the issue I'm having is that when I drop an instance of the control on a form from the toolbox, I can't interact with the control using the functionality exposed by a GridView (e.g. columns editor, data source selector, etc.), and I don't see any design-time rendering of the child GridView control. What I would like to do is to basically forward the designer behavior of my composite control down to its child GridView control. I have experimented with implementing a custom designer class that inherits from GridViewDesigner that simply initializes itself using the GridView child of my composite control. However, this doesn't seem to work, as I encounter an "object reference not set to an instance of object" error at design time; I'm wondering if this is even the appropriate strategy to achieve what I'm looking for. how to enable GridView-like design time behavior in composite controls. I have scoured the Web looking for articles on how this is accomplished, but I've surprisingly found virtually no resources on the topic.
