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?
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i have a masterpage and other pages. i want to use findcontrol method to find a textbox (not on the master page) to check whether it is empty or not.
my code is as folows;
Dim myContentPlaceHolder As ContentPlaceHolder = CType(Master.FindControl("MainContent"), ContentPlaceHolder)
Dim UpdatePanel1 As UpdatePanel = CType(myContentPlaceHolder.FindControl("UP1"), UpdatePanel)
I was wondering if it is possible to find a control in a standard web form that is using a masterpage.
So for example I have two pages - default.aspx and information.aspx. Both these web forms have label controls (lblDefault and lblInfo respectively). This information is stored in a database along with the content that the label controls should be populated with. Instead of having to program a method to retrieve the content text from the database for the relevent controls on these two pages would it be possible to find the controls in the masterpage codebehind file - something like Page.Form.FindControl("lblDefault")? So for each webform using a masterpage a check is done to see if any of the controls should be populated with content from the database.
I want to open a aspx page in new window.
I am openning a web page using JavaScript open .
StringBuilder cstext3 = new StringBuilder();
cstext3.Append("<script type=text/javascript> function OpenPreviewPage() {");
cstext3.Append("open('Preview.aspx');");
cstext3.Append("} </script>");
And executing following at button click on .cs page
protected void btnPreview_Click(object sender, ImageClickEventArgs e)
{
/*This will call the OpenPreviewPage method of java script from .cs file */
string javaScript =
"<script language=JavaScript>
" +
"OpenPreviewPage();
" +
"</script>";
RegisterStartupScript("ShowPreviewPage", javaScript);
}
The problem is the PreviousPage tag in preview page is null.
repPFareDetail = PreviousPage.FindControl("repFareDetail") as Repeater;
Is there any other way to open the aspx in new window by retaining the PreviousPage.FindControl method.
How can i use findControl and how can i get id's according to FindControl method? i need to get all TextBox data there are 40 textbox. And TextBoxid data... i reall want to learn also linq method ;)
protected void Button1_Click(object sender, EventArgs e)
{
// SetRecursiveTextBoxAndLabels(PlaceHolder1);
CreateForm creater = new CreateForm();
creater.Holder = PlaceHolder1;
creater.SetAccessForm();
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How can do I that? Does anyone have a solution. It is also looking tricky but I don't have an answer.
View 2 RepliesI use the following method to find a control on an asp.net page recursively:
/// <summary>
/// Searches recursively for a server control with the specified id parameter.
/// </summary>[code]...
I hit a problem because it was returning the wrong control. I tracked the problem down to the standard FindControl method, and fixed it by checking that the id of the control returned did actually match the one requested like this:
foundControl = start.FindControl(id);
if (foundControl != null && foundControl.ID == id)
return foundControl;
My question is why does start.FindControl(id) ever return a control that does not match the id requested?
Consider the following code, adding 2 textboxes with the same ID (oops):
protected void Page_Load(object sender, EventArgs e)
{
string TextBoxName = "TextBox1";
Panel p = new Panel();
TextBox t = new TextBox();
t.ID = TextBoxName;
p.Controls.Add(t);
if (p.FindControl(TextBoxName) == null) // <-------*******
{
TextBox t2 = new TextBox();
t2.ID = TextBoxName;
p.Controls.Add(t2);
}
Page.Form.Controls.Add(p);
}
The code is designed to stop adding the same ID twice. However, the Panel.FindControl() method is not finding a control that was added in the previous line of code.
Am I using this in the wrong way?
I mean - sure - I could manually iterate through the controls in the next level, like:
string TextBoxName = "TextBox1";
Panel p = new Panel();
TextBox t = new TextBox();
t.ID = TextBoxName;
p.Controls.Add(t);
TextBox t2 = new TextBox();
t2.ID = TextBoxName;
bool duplicateFound = false;
foreach( Control c in p.Controls )
{
if(c.ID == TextBoxName)
{
duplicateFound = true;
break;
}
}
if( duplicateFound )
{
t2.ID = TextBoxName + "__0";
p.Controls.Add(t2);
}
But I don't understand why this isn't working, whereas Placeholder controls and UserControls work fine.
The reason I am using Panels is for CSS styling. body > div > input - but still - it isn't working.
using the code below how come I cannot access a public method inside of a Site.Master page from a page using the Site.Master page:
Site.Master page:
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I'm trying to get the value of a textbox using the PreviousPage method and the previous page utilizes a MasterPage for the page's layout. I've read through many forums laying out the ground work on how to do this, but for whatever reason I am just being unsucessfull in getting this to work in my project.
Mark-up of previous page using a master page template:
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VB Code-behind page for second page:
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What really confuses me is that when I step through the code it goes all the way through the if statement but never gets the text value from the previous page.
I access querystring values in each content page's pageload method to get Username and Id. Is there a way I access the querysting values from Masterpage's pageload method and each content page goes to Masterpage to get those values without creating any other local variables in content pages? I know this can be done with Session's or view state but I was thinking to reduce redundancy of accessing query string in each content page.
View 3 Repliesi have a PayPal button, and i've been trying to add it to my site, but since my page is in a masterpage, and ovcourse, the form tag is editable only in masterpage, theres no way i could add the code inside the form tag, as so:
<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="K92PCJ9ULE8LC">
<input type="image" src="https://www.paypal.com/en_GB/i/btn/btn_donate_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online.">
<img alt="" border="0" src="https://www.paypal.com/en_GB/i/scr/pixel.gif" width="1" height="1">
</form>
But as i tried to create another form tag, it came up saying i could only have 1 server side form tag.So is there any way i could do this?
how does one call a page/webmethod which is based on a masterpage file from jquery?
View 7 RepliesI have a MasterPage (MasterPage.master) with 2 child MasterPages (specialMaster.master and standardMaster.master). From the MasterPage.master I need to get at some of the controls in one of the children, specialMaster.master, say for example to hide certain
content if a session variable is not null.
I have 2 masterpages. (Default.master and User.master).I have a hidden field in Default.master then how can i get the hidden field value of Default.master file from User.master.is there any way to access that hidden field like: Request.form("hidID") ?
View 2 RepliesI 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?...
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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.
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"
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:
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I pass this id from here:
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This is my code behind which is driving me crazy :(
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When I use label to display the STRING INTIME, IT GIVES ME "textboxCashier1In"
BUT WHEN I DO THIS:
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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)
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.
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Can anyone show me how to use this to get access to the properties of the dynamic DropDownList properties, especially the ListItems within.
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");
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";
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.
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.