I'm working in 2008 and cannot find out how to simply add the preload event to the code behind. In 2005 I just simply double clicked on the event in the list and it would set it up for me.
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Is there a technical reason for the existence of Page.PreLoad or is this just convenience to have a place where you can neatly place code that always have to be executed before the Load code? Is there a difference between adding code in the PreLoad event handler and adding code at the top of the Load event handler? And what would be a typical scenario where you use PreLoad?
View 2 RepliesSince PostBack data and viewstate data are available and initialized to their respective controls at the time of page PreLoad() event ,i want to know then which place is better to use - either PreLoad() or Load() event for dynamically checking my controls status ?For the last one year i was blindly using Page's Load() event .Why i was using Load() event ? I think the same logical part can be done in PreLoad() , since data are available at that time .But what is the main difference when i use my logic Here(PreLoad event) or there (Load event) ?
View 3 RepliesI used Photoshop/ImageReady to create navigation buttons with rollover effects etc and it outputed two sets of code - one is a preload script and the other is the main code that displays the buttons. I want the buttons to go in a Master page, either in the page itself or in a header control .ascx file (could use advice on whether one is better approach than the other). In any case I'm not clear on how to include the javascript preload code, shown below. Should the navigation menu buttons go in the master page, or in a header control, and if so, does it go in the <script runat="server" > </script> area? I'm using VB - is the code below alright for VB?
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Is there a way to preload images using asp.net c#? I'm populating 45 photos randomly from database, and display those photos in datalist control item template. I would like to be able to preload those photos that way the users are not seeing the "painting" ..
View 12 RepliesI am using swfupload to upload files on a website, the problem that every time the user open the page which contains the upload button, the page loads completely then the flash file start loading from scratch every time the user visit the page with no cache. Is there a way to preload and cache .swf files in my asp.net page?
View 3 RepliesMay seem like an easy question, but can I add a URL to submit button -
Other than using Response.Redirect ?
Further Info: What i'm trying to do is a lighbox control to a button which fades out the screen and forces them to read a warning message.This would work in HTML like this:
< a h r e f =" images/image.jpg" rel="lightbox"> link < / a >
but using response.redirect doesnt work:
Response.Redirect("lightbox/images/image.jpg?rel=lightbox")
(as it opens up the image in a new page).
When I add controls during dayrender event everything works fine. When the calendar is rendered in the browser the cell the control is added to gets larger. I mean the height of the cell grows alot. So, if I add something March 1st the cell that has the 1st in it grows very tall when I add a control to it. Does anyone have any ideas on how to get the cell from growing so tall?
View 6 RepliesBreakPoint not working in Init, InitComplate, PreLoad events in ASP.NET page with C# in VS2008. But it is working for Page_Load event.
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void InitializeComponent()
{
this.PreLoad += new System.EventHandler(this._Default_PreLoad);
this.InitComplete += new System.EventHandler(this._Default_InitComplete);
this.Init += new System.EventHandler(this._Default_Init);
this.PreRender += new System.EventHandler(this._Default_PreRender);
this.PreInit += new System.EventHandler(this._Default_PreInit);
this.SaveStateComplete += new System.EventHandler(this._Default_SaveStateComplete);
}
protected void _Default_InitComplete(object sender, EventArgs e)
{
........
}
protected void _Default_Init(object sender, EventArgs e)
{
.........
}
protected void _Default_PreLoad(object sender, EventArgs e)
{
..........
}
}
Controls.Add(linkButton)
View 4 RepliesI've just slapped together a new user control and I need to add a OnClick event to it so I can handle it via page code behind.
I've never had to do it before so if someone would be kind enough to shead some light that'd be fantastic.
I want to add some vb code within the html, or the source part of the page witjin visual studio here is my attempt but it doesnt seem to work, none of the requested parts appear.
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I'm trying to essentially add a dropdownlist control array to a from from the code-behind but I am getting an HttpException error saying that it must be placed inside a form tag with runat=server. How can I do this? This is the code I have right now for it:
DropDownList[] cmbArray = new DropDownList[8];
cmbArray[0] = new DropDownList();
Page.Controls.Add(synthesisSteps[0]);
This is in the Page_Load event. Also I am using .NET 3.5.
I have a GridView control that contians, among other things, a DropDownList. In this particular case, the DropDownList is in the EmptyDataTemplate, but I suspect I will run into a similar situation when I'm in Data Rows as well.I'm trying to handle the OnSelectedIndexChanged event for the DropDownList and in the .aspx file I have used the declarative syntax to assign the handler OnSelectedIndexChanged="ddlStoreList_SelectedIndexChanged") and have created the handler code to deal with this.
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The problem that I'm running into is that the event is not being handled. In other words, when I put a breakpoint in the handler, I find that it is not getting hit when I change the selection of the DropDownList.
I have a checkbox inside a repeater like below..I'm having trouble figuring out how I need to tie the onclick event to a javascript function..I know I need to use somthing like
butSubmit.Attributes.Add("onClick", "return confirmSubmit();") but Since my checkbox is inside a repeater and I'm using master pages. I'm not sure how I need to use the findcontrol to so I can call the Add method?
I need to add an onclick to the ChkAll checkbox
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I binded data (from a SQL) to a Listbox on a ASP.NET webform. Trying to find a way to add a rownumber with vb-code. Does someone know how to do this?
View 4 RepliesI have a CheckBoxList generated from the code behind file that I want to validate with a CustomValidator.However, I don't succeed in stating the C# function that it has to use, and I can't seem to bind it to the CheckBoxList control.
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and then something like:WorkCheckboxValidator.ControlToValidate = WorkScheduleCheckboxList.ToString();
I have a dropdown which i have binded code behind as:
protected void PriorityType()
{
DPriority.Items.Add(new ListItem("--Select--", "0"));
DPriority.Items.Add(new ListItem("High", "1"));
DPriority.Items.Add(new ListItem("Medium", "2"));
DPriority.Items.Add(new ListItem("Low", "3"));
}
It shows the items in gridview correctly but when i insert in database as DPriority.SelectedValue . it does not save the text but the index
Like if i choose High in database it saves as 1 but it should save as text not index.
As you said that for storing use data table and make property in the .ascx.cs file but I have problem that I m not able to get that property in the .aspx page. How to add multiple instances of web usercontrol on page on button click event?
View 1 RepliesI was wondering if there was anyway to populate the page with asp.net code like "<asp:Repeater ID="rptProducts" runat="server">MORE_CODE</asp:Repeater>" and then have the server use that code on the page. I'm not sure if i'm making sense. Like writing the asp.net front end code to the page dynamically before the .net engine generates the output html.
View 3 RepliesI am having issues correctly setting up reference to javascript code to a custom validator.This is my javascript code in the .aspx page.
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And here is where I add the Client Validation to the customer validator in the code behind.
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The validation is if there is a value present in the first text box then the second text box is required.The page throws an error when the validation should fail, but if I ignore the error the validation works correctly.Do I need to move my javascript to the code behind as well?
I'm trying to add some basic HTML markup to my code-behind, just a H1 and a few breaks separating strings in the message.Body, but can't seem to get it going without errors.
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Probably a straightforward thing, or not intended usage at all,
I am generating xhtml in code that is then inserted into the page. Are there class(es) that help with adding tags etc. Then having a function that will output it to a string. (like the xml dom api) code like:
tagBody = Doc.GetBody();
tag1 = tagBody.AddTag(tag_a, "Asp.net");
tag1.SetAttribute("href", "http:/asp.net");
tag1.AddTag(tag_br);
tag1.InsertTag(tag_br);
Output from tostring function like:
<body>
</br>
<a href="http://asp.net">Asp.net</a>
</br>
formatting for an on click event in a hyperlink control:
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I get an error with the using the <% %> within the onclick.
I inherited an application written for VB.Net and am converting it over to ASP.Net, with VB as the back end. I have a data pull that adds values to a new instance of a class, then adds the item to a listbox. It worked great in the VB.Net version, but I get the following error in the Visual Studio Text Editor when I try to use the code:
Overload resolution failed because no accessible 'Add' can be called with these arguments:
'Public Sub Add(Item As System.Web.UI.WebControls.ListItem)':Value of type 'MyItem' cannot be converted to System.Web.UI.WebControls.ListItem'.
'Public Sub Add(Item as String)':Value of type 'MyItem' cannot be converted to String.
I have played around with the code quite a bit and have been researching online, but I'm just drawing a blank here.
I put the class("MyItem") in the "App_Code" folder in a file called "MyItem.vb". The class code is as follows:
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The code I have for the sub that is supposed to add the items to the listbox is as follows:
[Code]....
