Seem to be having trouble getting ahold of an asp:Image I placed on an .aspx page in my code behind. I'm trying to set the Visible property to "true" programatically.
What am I doing wrong here?
.cs (see lines 81-87):
[Code]....
And .aspx:
[Code]....
I am writing my own captcha generator page using an aspx form that generates an image.
In the form that displays the captcha I have the following img tag -
<asp:Image ID="Image1" runat="server" ImageUrl="~/captcha.aspx" />
and things works well.
What I want to do is use the image tag with width and height specified properties -
<asp:Image ID="Image1" runat="server" width="100" height="50" ImageUrl="~/captcha.aspx" />
and in my captcha.aspx read the width and height properties in my captcha generator vb script.
How can I access the width and height from my captcha generator vb script?
Here is what im trying to do I want to, from my c# code-behind, get the code between 2 <asp:Content> tags that are located in one of my .apsx pages.
View 8 RepliesI am trying to access Buttons on my web form from the c# code to set the command Argument and click event handler. I am getting following two errors.
Error 1
The best overloaded method match for 'System.Web.UI.ControlCollection.this[int]' has some invalid rguments
Error 2
Argument '1': cannot convert from 'string' to 'int'
i have a .JPG file in my local machine which has to be sent as body of SMTP mail.Path of image D://foldername//imagename.jpg The code I run is in the server mc. I want it to access my local machine's d: folder to get the image file. But it is accessing the server mc's d: folder. How can this be done?
View 3 RepliesI was able to acces an HTML element from my c# code this way:
Page.Request.Form["Name"].ToString(), where name was an html element:
<input id="Name" style="z-index: 102;" type="file">
Now that I put this html inside a Tab containe (subpanel) the Page.Request.Form["Name"].ToString() fail, actually while I was debugging I could not find this element inside Page.Request.Form.
maybe there is another way of accessing the Html element from my c# code?
I'm using varbinarymax.....IN SQL gridview image and setting the nullimage value doesn't this problem.. I'm looking for code that can make this lil miracle happen
& it doesn't really matter which way , whether the code says if image null then display this image from ~/Images/thispic.jpg or if i1 display this image from ~/Images/thispic.jpg for a little bit more insight into this I'm creating a legend for the database and the null has been used for displaying one pic so i'm after the 1 or visa versa to display another image.... and i'm not trying to upload pics to 1000 plus documents, and when i came at it from a sql angle tying 5 tables together the parent table ended up not sending the proper return. is this even possible or am i ahead of visual studio
i have a <div> named 'mydiv' on a web page and have set it's runat property as <server> so it is visible within
my vb.net server side code.
i can see the mydiv within the server side code.
my question:
how do i adjust the height/style of the <div> withion the vb.net code so that whe the page is posted back the new height/style settings apply. how do i get to the style properties server side?
Is it possible to accessing a HTML button's value from code behind file?
View 2 RepliesI have a page where i am creating a number of <span> elements using clientside code.
I am creating the elements using jquery like this
[Code]....
But this returns a null object everytime. I have tried this code on a span that is on the page at the beginning and it works so i guess its something to do with how im creating the control dynamically.
I've been playing with a certain detailsview for most of last week. This particular control is located within a panel that is hidden until a user clicks a linkbutton on a gridview. Then the panel's visible property is set to true and the detailsview is populated based on the commandargument passed through the link button. What I've discovered is that with each postback, the datakey or control parameter, still not sure which or if both, is lost. I've discovered a lot about ViewState and how controls work and am a bit surprised that something as common as using a detailsview within a gridview wouldn't be handled better than it is now. I have been able to get the proper information to build a correct select statement when the user decides to edit a record. I am now working on an update statement, but for some reason while I have the right key to update the right record, I am unable to access the user-generated data that was entered in the details view.
For instance, I select record with ID of 1 in the gridview. It pulls up the detailsview and I can view it. I then click edit. The correct record is still there. (It was previously going to default). When I enter new text in a textbox and click update, the app still knows I am working with record #1 but doesn't seem to be able to find the textbox control. I have currently hard-coded a value into the field just to see if I could actually get the record to update and it did. I am using an OnInit to cause the sub to run and think this might be the problem. However, I have been unable to find a better way around this.
Here is the sub that executes on the OnInit() of the detailsview:
Protected Sub notes_binding()
If notesDetail.CurrentMode = DetailsViewMode.Edit Then
sqlNotesUpdate.UpdateCommand = "UPDATE [Oilchange_Notes] SET [notes] = '" & CType(notesDetail.FindControl("notes"), Textbox).Text & "' WHERE [vehicle_id] = " & Session("unitNumVal")
sqlNotesUpdate.UpdateCommandType = SqlDataSourceCommandType.Text
sqlNotesUpdate.Update()
End If
sqlNotesUpdate.SelectCommand = "SELECT * FROM [Oilchange_Notes] WHERE ([vehicle_id] = " & Session("unitNumVal") & ")"
End Sub
And this is the error I get: Object reference not set to an instance of an object. If I'm correct about why it's not pulling the actual value or even acknowledging the control exists and is actually 'notes' (it is), then at would point would be the best to place this code?
I'm currently running with this.
[Code]....
Works find on initial page load, but gives me "Object variable or With block variable not set."
on this like "ColourHex = e.Item.DataItem("ColourHex")" on postback?
I have a class that derives from System.Web.UI.Page and have set my pages to derive from this custom page class instead of Page. At runtime, the controls are never initialized and throw a NullReferenceException. I've changed some class names and namespaces in the pasted code to protect the innocent. The only thing that I currently override in my PageBase is OnPreLoad and I do call the base.OnPreLoad. I'll eventually add more functionality to this PageBase but for now all that it has is this:
[Code]....
I've tried putting this into a class library (with System.Web referenced) and I've also tried moving the class into the web application and had the same results either way. As another strange twist, I have another class with derives from PageBase called IndexPageBase and it doesn't have this problem:
[Code]....
[Code]....
[Code]....
I have a link tag which assignes a bookmark icon to the page:
<link rel="shortcut icon" href="/App_Themes/Default/images/bookmark.ico" type="image/x-icon"/>
Currently, it's hard coded to the Default theme, but I want it to change based on the theme that is applied to the web app. How can I point to the current theme directory?
I created a user control in Asp.Net which I populate with <asp:Table id = "...." /> this table has columns that contain dropdownlists, textfields and other web controls. In the code behind I am not able to access these web controls, is there a way I can access them. or I shouldn't be doing that in the code behind of the user control? here is my ascx code markup:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MarriageControl.ascx.cs" %>
<%@ Register assembly="BasicFrame.WebControls.BasicDatePicker" namespace="BasicFrame.WebControls" tagprefix="BDP" %>
<asp:TextBox ID = test runat = "server" />
<asp:Table ID = "marriageInfoTable" runat = "server" Caption="معلومات الزواج"
CellPadding="2" CellSpacing="2" Width="979px" Height="164px">
<asp:TableRow runat="server">
<asp:TableHeaderCell runat = "server" Text = " " />
<asp:TableHeaderCell runat = "server" ID = "husbandHeader" Text = "الزوج" HorizontalAlign = "Right" />
<asp:TableHeaderCell runat = "server" ID = "wifeHeader" Text = "الزوجة" HorizontalAlign = "Right" />
</asp:TableRow>
<asp:TableRow runat="server">
<asp:TableCell runat = "server" Text ="الاسم الرباعي" />
<asp:TableCell runat = "server">
<asp:TextBox runat ="server" ID = "fullNameHusbandTextBox" Height = "30px" Width = "250px" Font-Bold = "true" Font-Size = "20px"/>
</asp:TableCell>
<asp:TableCell runat = "server">
<asp:TextBox runat ="server" ID = "fullNameWifeTextBox" Height = "30px" Width = "250px" Font-Bold = "true" Font-Size = "20px"/>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server">
<asp:TableCell ID="dateOfBirthCell" runat = "server" Text ="تاريخ الميلاد" />......
i have a unordered list(HTML) whose style i am changing conditionally in the code behind
<ul class="steps">
<li class="" id="step1" runat="server">Step 1</li>
<li class="step2" id="step2" runat="server">Step 2</li>
<li class="step3" id="step3" runat="server">Step 3</li>
<li class="step4" id="step4" runat="server">Step 4</li>
</ul>
in the code behind iam doing something
step1.Attributes["class"] = "step1";
step2.Attributes["class"] = "step2New";
something like this
If iam using internal styles then its working fine but when iam taking the same style sheet to external file then it is not working
Is it because i am assigning attributes using id i don't know
the css file is some what like this
[Code]....
I have a code behind page that has several method; one of them is a page method.
[WebMethod]
public static void ResetDate(DateTime TheNewDate)
{
LoadCallHistory(TheNewDate.Date);
}
protected void LoadCallHistory(DateTime TheDate)
{ bunch of stuff }
The method LoadCallHistory works fine when the page loads and I can call it from other methods inside the page. However, in the web method part, it gets underlined in red with the error "an object reference is required for the non-static field".
How do you access functions from the page method part of the code?
I have a few pages in my web application where I would like to be able to use the code-behind of a master file, but not 'inherit' any of the other stuff like asp/html markup etc.
View 5 RepliesI know in standard VB.Net development, you can access any form field from within a module class but I'm not sure how to do it using Web Forms.Here is my scenario:I have a Module.vb where I am putting all my Database Functionality. In each of my functions, I'm using a Try Catch construct.
View 7 RepliesI want to use the setting stored in the web.config file in my vb code, but don't know how to reference them.
More specifically I want to access the Host name, username and password in the smtp settings to send an email. My web.config is
[code].....
i have a link button which i have created dynamically and added it to a div i want to access this link button in some other function in code behind how to do this
View 3 RepliesI need to display a control consistently across a set of pages. So I'm using a MasterPage to do that in ASP.NET/C#. However I also need to programmatically access this control, mostly provide options to view/hide depending on whether the controls checkbox is clicked.
Here is the Source for the MasterPage
<div id="verifyInitial" runat="server">
<asp:CheckBox ID="chkInitialVerify" runat="server"
oncheckedchanged="chkInitialVerify_CheckedChanged" />
I agree that my initial data is correct.
</div>
<div id="verifyContinuous" runat="server">
<asp:CheckBox ID="chkContinuousVerify" runat="server"
oncheckedchanged="chkContinuousVerify_CheckedChanged" />
I agree that my continuous data is correct
</div>
Now in the code behind I want to perform the following operations. Basically if a person clicks on the checkbox for the initial div box, then the initial box disappears and the continous box shows up. However it seems that the code behind for the MasterPage does not activate whenver I click on the checkbox. Is that just the way MasterPages are designed? I always thought you could do add some sort of control functionality beyond utilizing the Page Load on the Master Page.
protected void chkInitialVerify_CheckedChanged(object sender, EventArgs e)
{
verifyContinuous.Visible = true;
verifyInitial.Visible = false;
}
protected void chkContinuousVerify_CheckedChanged(object sender, EventArgs e)
{
verifyContinuous.Visible = false;
}
Is it possible to access a code behind property for a server tag? I have a property on my code behind page that i want to pass into a javascript function i.e.
<asp:RadioButton onclick="moveToNextPage()" class="inputcell" Runat="server" ID="myRadioButton" Text="No"></asp:RadioButton>
So i want to be able to get the variable out of my code behind page and pass it to the "moveToNextPage()" function. Is this possible?
I have a page called Article.aspx that takes content from the database. I would like to use the title of the content as the title of the page for a little SEO I am doing. I setup a literal on the aspx page that must take the value of the content title from the code behind, what is the best way about doing this? I'm guessing I need to open a data base connection to read the record from the table but I am still learning asp.net and not sure how to write it
View 22 RepliesI've a web project where i've an Tab Container (ajaxtoolkit), and when i run the project it works properly. But when i debug it, it gives me erros in all the controls inside the Tab Container that i'm accessing through .cs code behind (buttons, checkbox, etc).
Visual Studio gives me "The name 'controlname' does not exist in the current context". This happen to all controls inside the Tab Container that i'm accessing in code behind, but the Web project is running with no problems! As it's the first time that i use an Tab Container, i don't know if this is normal or maybe of Visual Studio 2010 RC (or not).