I'm trying to find a TextBox in the code-behind page, it's inside a nested master page and also then inside another control container (it's inside ctrlCheckoutShippingAddress also) .
and I want change it's color in behind code so I wrote:
(this.Master.FindControl("HyperLink1") as HtmlGenericControl).Style["color"] = "black";
but below error happen:
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 13: Line 14: (this.Master.FindControl("ADMenuMessage") as HtmlGenericControl).Style["background-image"] = Page.ResolveUrl("~/Image/ADactivmenu.png"); Line 15: (this.Master.FindControl("HyperLink1") as HtmlGenericControl).Style["color"] = "black"; Line 16: } Line 17: }
how I can change hyperlink textcolor in behind code?
I have a control on a master page called "panel1". I would like to access it from my Javascript on the content page. I have tried var panel1 = document.getElementById('<%= panel1 %>'); It doesn't work since it is on the Master page.
I looked at your example URL....I have ScriptManager in masterpage how call ScriptManager from masterpage in editorPage.aspx if (Script Manager 1.IsInAsyncPostBack)
So all I want to do is simply find a user control I load based on a drop down selection. I have the user control added but now I'm trying to find the control so I can access a couple properties off of it and I can't find the control for the life of me. I'm actually doing all of this in the master page and there is no code in the default.aspx page itself.
MasterPage.aspx
[Code]....
MasterPage.cs
protected void goToSelectedPage(object sender, System.EventArgs e) { temp1 ct = this.Page.Master.LoadControl("temp1.ascx") as temp1; ct.ID = "TestMe"; this.UpdatePanel1.ContentTemplateContainer.Controls.Add(ct); } //This is where I CANNOT SEEM TO FIND THE CONTROL //////////////////////////////////////// protected void lnkSave_Click(object sender, System.EventArgs e) { UpdatePanel teest = this.FindControl("UpdatePanel1") as UpdatePanel; Control test2 = teest.ContentTemplateContainer.FindControl("ctl09") as Control; temp1 test3 = test2.FindControl("TestMe") as temp1; string maybe = test3.Col1TopTitle; }
Here I don't understand what it's telling me. for "par" I get "ctl09" and I have no idea how I am supposed to find this control. temp1.ascx.cs
I have two web sites, one is a copy of the other.A page that exists in each website references a master page like this:MasterPageFile="~/Dealermaster.Master"This works fine in one site, but not the other. The master page exists in the root dir of both sites. The pages are in a dir called /Pages. If I copy the master page into the /Pages dir and remove the "~/" it works fine. I am debuging both sites in Cassini.
I'm using the following code to iterate through a list of validators on the page. For each validator, I want to set the background color for the control its responsible for validating. The problem I'm having is that FindControl method is always returning null. From searching the web, it appears the problem is that the page has a master page. Whether this is the issue or not, it's obvious that the FindControl method cannot find the ControlToValidate control.
Method used to iterate all validators on a page:
protected void ShowControlsToValidate(Page page) { if (page == null) return;
I'm looking for a way to dynamically load a master page in order to get a collection of ContentPlaceHolders within. I would prefer not to have to load a page object to assign the master page to before I can access it's controls, but if that's the only way I'll be happy to use it. This is the way I was hoping it would work:
Page page = new Page(); page.MasterPageFile = "~/home.master"; foreach (Control control in page.Master.Controls) { if (control.GetType() == typeof(ContentPlaceHolder)) { // add placeholder id to collection } }
But page.Master throws a null reference exception. It only seems to load at some point when an actual page has been created in the page lifecycle. I even thought of dynamically changing the current page's MasterPageFile on Page_Init(), reading all ContentPlaceHolders then assigning the original MasterPageFile back, but that would be horrible!
Is there a way to load a master page into memory independent of an actual page so that I can access properties of it? My final resort will probably involve parsing the master page contents for ContentPlaceHolders instead, which isn't as elegant but might be a bit faster.
I have a master page that divides the main content into two areas. There are two asp:ContentPlaceHolder controls in the body section of the master page with IDs cphMain and cphSideBar respectively.
One of the corresponding content pages has a control in cphMain that needs to refer to a control in cphSideBar. Specifically, a SqlDataSource in cphMain references a TextBox in cphSideBar to use as a parameter in the select command. When the content page loads the following run-time error occurs:
Could not find control 'TextBox1' in ControlParameter 'date_con'.
Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
[code]....
I kinda know what the problem is... ASP.NET does not like the fact that the SqlDataSource and TextBox are in different asp:Content controls within the content page.
As a workaround, I have another TextBox in cphMain with the SqlDataSource which has Visible=False. Then in the Page_Load() event handler the contents of the TextBox in cphSideBar is copied into the contents of the non-visible TextBox in cphMain.
How to access controls in master page using javascript? The master page consists of a search textbox, on key down event of the control I call a javascript function writtern inline of the master page. I get the value of entered in textbox in that javascript function. I have tried giving document.getElementById("<%=txtSearch.ClientID %>").value as well as document.getElementById("txtSearch").value. Both display error. I have to access the textbox control from within the master page itself!
I am tring to send form values to a page from a user control. I included the user control in a master page.When i use page.previouspage it can not get value. is there any way to send form data to a page from a user control included in a master page?
I have a javascript function on my Master page, how do I access it with a dropdownlist of a content page. Not from codebehind, I can do that, but from the control itself such as the onSelectedIndexChanged event.
how to remove master page prefix from control ID after rendering content page
i m using master page in my web application, i am using a java script that works on one of my div id and i am genrating div at run time using C# code, problem is that one one of my content page rendred a prefix ct100 attached on that div,
How can i remove that prefix from my server side control (assume panel) id
I have a MasterPage where I use the menu control. Clicking a menu item loads a new content page. That part works fine.
I would like to use staticselected style to change the look of the selected menu item. However, when the new content page loads, the staticselectedsyle formatting does not work.