where i created a usercontrol that has a dropdownlist but when setting the dropdownlist selected index in the page_load it was not updating on the postbacks to the new index but first loading was ok.until i implemented the method for modifying the usercontrol in the onprerender and then it was updating the indexwhy was the control intialized to its original state without using the overidden prerender method?
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I'm getting 100+ errors per day on my website with System.Web.HttpException: Invalid viewstate. The website is asp.net 3.5 running on iis6 , not running in a web-garden/web-farm , single server.Here are a few sample errors.
Machine: ML Framework Version: 2.0.50727.3603 Assembly Version: 6.5.3664.33889
Source: http://www.domain.com/WebResource.axd?d=z5VmXXoSLLpQHoPictureAlert
Exception: System.Web.HttpException: Invalid viewstate. at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType) at
i already tried wraping all inline javascript with //<![CDATA[ //]]>
i already set enableViewStateMac to false.From looking at all the errors guessing out of the "d" paramter it seems to focus on a single usercontrol on my website.in this control i change the visiblity of div's + text in the usercontrol OnPreRender function.
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
PreparePage();
}
Can the errors be related to the usercontrol behavioral?
My original understanding was that the asp.net page lifecycle is run once for all pages and controls under normal circumstances. When I attached a control during a container's OnPreRender, I encountered a situation where the control's OnInit was not called. OK, I considered that a bug in my code and fixed as such, by attaching the control earlier.
But just today, I encountered a situation where OnInit for a control seems to be called after the normal OnInit has been done for everyone else. See stack below. It seems that during the page's PreRender, the control's OnInit is called as it is being dynamically added.
So I just want to confirm exactly what ASP.NET's behavior is? Does it actually keep track of the stage of each control's lifecycle, and upon adding a new control, it will run from the very beginning?
[HttpException (0x80004005): The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.]
System.Web.UI.ControlCollection.Add(Control child) +8678663
MyCompany.Web.Controls.SetStartPageWrapper.Initialize()
MyCompany.Web.Controls.SetStartPageWrapper.OnInit(EventArgs e)
System.Web.UI.Control.InitRecursive(Control namingContainer) +333
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Control.AddedControl(Control control, Int32 index) +198
System.Web.UI.ControlCollection.Add(Control child) +80
MyCompany.Web.Controls.PageHeader.OnPreRender(EventArgs e) in
System.Web.UI.Control.PreRenderRecursiveInternal() +80
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842
This i would like to use in edititemtemplate column: is it possible to use onprerender, i used it with datagrid, not sure with gridviews.
<asp:DropDownList id="name_add" runat="server" CssClass="TextBoxes" DataSource="<%# BindTheUserName1() %>" DataTextField="username" DataValueField="userid" OnPreRender="SetDropDownIndex">
</asp:DropDownList
way to overwrite any contents of a folder upon fileupload even if the filename isnt the same? I only want one image stored at anygiven tim, but I have no way of knowing what filename the user may upload so how would you overwrite in my code below?
if (FileUploadControl.HasFile)
{
try
{
string theUserId = Session["UserID"].ToString();
OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver};
[code]...
I have a application which uses webparts and 1 control is also a Script Control.So my user controls are derived from System.Web.UI.WebControls.WebParts.WebPart which makes them webpartsI have everything setup and working fine as far as the personalization and webpart goes... every thing displays and works fine.Except that 1 of my control needs to do a bit of work in the OnPreRender event and it turns out that event only gets fired when a user is loged in the application
View 1 RepliesI have a user control which has html elements like <input type="button".... and i want to set its display property on preRender state.Would you please explain, what kind things i have to handle this user control? So, in this functionprotected override void OnPreRender(EventArgs e) { }
I have only EventArgs e and it doesn't have proper method or properties to bring me the html of user control.
I'm attempting to use a Button's OnCommand method to handle it's click event so that the event is passed on to OnPreRender method as shown below. So basically the OnPreRender method is called upon a button click. I'm need to use the OnCommand method because I have 2 buttons.
//mark up
<asp:DataPager ID="GroupSearchResultPager" runat="server" OnPreRender="groupSearch_PreRender" >
<asp:Button ID="btnSearchUser" runat="server" Text="Search" OnClick="btnSearchUser_Click" CommandName="searchUser" />
//code behind
protected void btnSearchGroup_Click(object sender, CommandEventArgs e)
{
groupSearch_PreRender(this, e); //call groupSearch_PreRender
}
protected void groupSearchView_PreRender(object sender, CommandEventArgs e)
{
if(e.CommandName=="searchUser")
{
do stuff
}
}
However, this results in the following exception:
CS0123: No overload for 'groupSearch_PreRender' matches delegate 'System.EventHandler' So basically groupSearch_PreRender only takes an EventArg. I've tried casting as shown below but it doesn't seem to work. How else can I pass the button click event to the PreRender method?
protected void groupSearchView_PreRender(object sender, EventArgs e)
{
CommandEventArg entry = (CommandEventArg)e; //casting to CommandEventArg
if(entry.CommandName=="searchUser")
{
do stuff
}
}
I am using form authentication and in my web.config file I put the login url as "login.aspx".. Every time when the user goes to member area, it will return to that login.aspx if the user has not logged in yet.
However, there's one part in my web application that if the non-members clicks "Search" button, it's trying to access the search result asp.net page in my member folder/area. I want to take them to the registration page rather than the login page. How can I overwrite the form authentication login url?
How to "overwrite existing log file" ??? I have tried to set attribute property <appendToFile value="false" />. but still log file is not getting overwrite. My config file setting is as follow:
<log4net>
root>
<level value="DEBUG" />
<appender-ref ref="LogFileAppender" />
</root>
[code]...
With the following code:
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
[Code]....
I want to make it so that if the file exists it changes the name of it, is there any built in functionality for this? Classic ASP had a parameter so that when you upload say house.jpg, and then again it would become house(1).jpg etc etc which was useful.
my user controls are derived from System.Web.UI.WebControls.WebParts.WebPart which makes them webparts.I have everything setup and working fine as far as the personalization and webpart goes... every thing displays and works fine.Except that 1 of my control needs to do a bit of work in the OnPreRender event and it turns out that event only gets fired when a user is loged in the application.
Protected Overrides Sub OnPreRender(ByVal e As EventArgs)
If Not Me.DesignMode Then
Me.isloaded = True
' Test for ScriptManager and register if it exists
sm = ScriptManager.GetCurrent(Page)
[code]...
Is it possible to access the value of a label and want to tweak it before it to textbox which is in edititemtemplate column.
<ItemTemplate>
<asp:Label ID="lblUnitprice" Text='<%# FormatPrice(Container.DataItem("UnitPrice")) %>' Runat="server" />
</ItemTemplate>
<EditItemTemplate>
<asp:Textbox runat="server" CssClass="TextBoxes" MaxLength="14" Columns="8" id="UnitPrice_edit" Text='<%# FormatPrice(Container.DataItem("UnitPrice")) %>' />
</EditItemTemplate>
Used onprerender a lot with dropdownlist boxes never used with textboxes.I have two currencies used in my application, want to format before i show to use.
i am using html.textboxfor to display the amount (int) from my model. currently once the form is shown, the default amount is = 0. i wish to have the default set as 1, is it possible to overwrite the default for html helper??
[Code]....
We recently migrated applications from one web server to another. Previously they could upload files to the server and if it already existed, it would over write with the new one.
Now I have to manually delete the file from the server so they can upload a new one. If I delete it they can upload a new one and even upload one to overwrite the one they uploaded. But only after I delete the "migrated" one.
All of the security is correct. ASPNET and IIS_WPG have permissions.
Da Code:
If System.IO.File.Exists(UploadLoc + Me.FileUpload_PDF.FileName) Then
System.IO.File.Delete(UploadLoc + Me.FileUpload_PDF.FileName)
End If
Me.FileUpload_PDF.SaveAs(UploadLoc + Me.FileUpload_PDF.FileName)
I get the dreaded "access to the file is denied"
Update: I find if I give "USER" modify rights it works, but that does not seem secure.
What is the best way to implement an edit page to allow only one user to modify data at a time. For example, if User A is on the edit page, no other user will be enter the page in edit mode until UserA is done editing.
View 3 RepliesHow would I NOT overwrite a file if it exists on the server already using the AsyncFileUpload control?
View 2 RepliesWhen a user types a value into a TextBox that has a MaskedEditExtender attached to it, the current input is overwritten. It is however required that the input is appended to the existing value, which is the normal behaviour of a TextBox. Is there a property or setting to enable the normal input behaviour?
View 1 Replieshow can i use multi javascript files with RegisterClientScriptInclude method in custom server controls. when i call two or more RegisterClientScriptInclude method, this method registers only one of the javascript files.
[Code]....
[Code]....
[Code]....
I want if a file exists then it ask for "do u want 2 overwrite ?" with yes or no confirmation ,,, if yes then overwrite otherwise not.
I want to do this with of ConfirmationExtender with a textbox because the user can enter some info like who is the user and overwrite on what reason.
Is there a way to do this in either scalar function form or in an aggregate function form? The problem I'm dealing with is building a security system with multiple tiers of inheritable permissions. Like you'll inherit certain permissions form the department level and then certain permissions from the supervisor level. I'd like to find a way to produce these resultsFor user permissions I pull these binary values and get these results, (they are sorted by their tree node depth level in the hierarchy.
View 4 RepliesIs there a way to do this in either scalar function form or in an aggregate function form? The problem I'm dealing with is building a security system with multiple tiers of inheritable permissions. Like you'll inherit certain permissions form the department level and then certain permissions from the supervisor level. I'd like to find a way to produce these results
For user permissions I pull these binary values and get these results, (they are sorted by their tree node depth level in the hierarchy.)
[code]....
Does it look like I will be stuck with manually compiling the tables of departmentpermissions and supervisorpermissions base on every possible outcome of inherited permissions or is there a way to do this on the fly in an efficient manner?
I m having little misunderstanding that how basepage inheritance work in asp.net. I saw this example [URL] and others and I just have questions to get better understanding on the articles: Do we always need override type function in base page even if we dont want to overwrite in child page. What is the purpose of "MyBase.OnLoad(e)"?
' -- VB.NET
Public Class MyBaseClass
Inherits System.Web.UI.Page
Protected Overrides Sub OnLoad(ByVal e As EventArgs)
'... add custom logic here ...
'Be sure to call the base class's OnLoad method!
MyBase.OnLoad(e)
End Sub
End Class
I hv a file upload control which save files in folder upload_html. When I upload file of same name which already exists upload_html folder it does't replace that file.........
I want that file to be replaced from that folder.............
