C# - Forcing A Postback Asp.Net
May 12, 2010
Please take a look at the following click event...
Protected Sub btnDownloadEmpl_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDownloadEmpl.Click
Dim emplTable As DataTable = SiteAccess.DownloadEmployee_H()
Dim d As String = Format(Date.Now, "d")
Dim ad() As String = d.Split("/")
Dim fd As String = ad(0) & ad(1)
Dim fn As String = "E_" & fd & ".csv"
Response.ContentType = "text/csv"
Response.AddHeader("Content-Disposition", "attachment; filename=" & fn)
CreateCSVFile(emplTable, Response.Output)
Response.Flush()
Response.End()
lblEmpl.Visible = True
End Sub
This code simply exports data from a datatable to a csv file. The problem here is lblEmpl.Visible=true never gets hit because this code doesnt cause a postback to the server. Even if I put the line of code lblEmpl.Visible=true at the top of the click event the line executes fine, but the page is never updated. How can I fix this?
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Mar 12, 2010
I have been trying to figure out out to force a postback from an asp ajax extender. The closest post that I can find is
http://forums.asp.net/t/984558.aspx
However I am pretty sure this was at least one migration ago. Additionally I am using VB as my programming language so some of the conversion may be the problem.
I think I am pretty clear on what needs to be done.
If I am correct the steps are...
Create a new property in the extender to hold the postback command for each target control that is using the extender.
Then in the Onload populate that property (Use GetPostBackEventReference to get the ASP valid target ID ) so it can be called from the Clientbehavior.js
My problem is the syntax in the for-each loop that allows me to iterate through the target controls.
Protected Overloads Overrides Sub OnLoad(ByVal e As System.EventArgs)
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Apr 19, 2010
I have basically the following structure set up :
[Code]....
I am aware that a FileUpload requires a full page postback. I read the article http://www.4guysfromrolla.com/articles/090209-1.aspx[^]I tried to install a PostBackTrigger programmatically to get a full postback only on the ImageButton1 control. All other postbacks must be partial. (GridView sorting, paging, ...)In code behind I do :
[Code]....
The above code does not seem to install a full postback only for the ImageButton1, so the file upload fails. How can I make this work ?
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Jan 6, 2010
I'm trying to solve a problem and am open to any suggestions. Here's the situation:
I have a checkout page that has an iFrame that contains a credit card form. The credit card form resides on an external site that is PCI compliant (and it is a requirement that we are PCI compliant so having the credit card form on our domain is not an option). When the user submits the checkout form, I need a way to force the submission of the iFrame form on the server side. This is because I need to wait for the credit card form's site to send back a reply via a web service on my end, which will be passing a token that I save and use later on when the order is submitted. I also will display any validation errors that are reported from the credit card form site, also via the web service.
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Mar 8, 2010
Hoping I have placed my question in the correct forum.
I am writing an application that simply updates a text box (contained in a AJAX UpdatePanel) via a thread. the eventual idea being that the textbox will be placed in the master page, and a thread will poll a table to check for status messages. 90% of the code works as it should, the only side that is not working, is physically updating the textbox. The value of the textbox is being updated, but it is not being reflected on the screen. When the text is updated in the textbox, the OnChange event is not firing (as it shouldn't), but I still need the textbox to be updated. The textbox is being updated prgramatically, and not by the user.
When the thread triggers, it just fires an event, which right now just updates the textbox with the current date time. I've tried a million and one different ways, but still no luck :( Anyone know where I am going wrong?
Here is my code:
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Always" runat="server">
<ContentTemplate>
<asp:Table ID="Table1" runat="server">
<asp:TableRow>
<asp:TableCell>
<asp:Label ID="lblThread1" runat="server" Text="Thread1"></asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:TextBox ID="txtThread1" AutoPostBack="true" runat="server"></asp:TextBox>
</asp:TableCell>
<asp:TableCell>
<asp:Button ID="btnstartThread1" runat="server" Text="Start Thread 1" onclick="btnstartThread1_Click" />
</asp:TableCell>
<asp:TableCell>
<asp:Button ID="btnStopThread1" runat="server" Text="Stop Thread 1" onclick="btnStopThread1_Click" />
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</ContentTemplate>
</asp:UpdatePanel>
public partial class _Default : System.Web.UI.Page
{
private static clsThread1 _objObject1 = new clsThread1();
private static Thread _objThread1;
//****************************************
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
_objObject1.UpdateThread1Time += new EventHandler(UpdateThread1TimeEvent);
}
}
//****************************************
private void UpdateThread1TimeEvent(object sender, EventArgs e)
{
this.txtThread1.Text = System.DateTime.Now.ToString();
}
//****************************************
protected void btnstartThread1_Click(object sender, EventArgs e)
{
_objThread1 = new Thread(new ThreadStart(_objObject1.StartProcess));
_objThread1.Start();
while (!_objThread1.IsAlive) ;
}
//****************************************
protected void btnStopThread1_Click(object sender, EventArgs e)
{
if (_objThread1 != null)
{
_objThread1.Abort();
_objThread1.Join();
}
}
//****************************************
}
public class clsThread1
{
public event EventHandler UpdateThread1Time;
public void StartProcess()
{
while (true)
{
UpdateThread1Time(this, EventArgs.Empty);
}
}
}
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Jun 15, 2010
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Feb 23, 2010
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[code]...
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Jan 22, 2011
I'm trying to keep track of employees in my database. I have two tables, Employees and Departments. The Employees table contains a foreign key relationship with Departments through a column named DepartmentID.
Here's my entity:
[code]....
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In my "selecting" statement I need to add two dynamic parameters when using the LinqDataSource's WhereParameters collection:
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Feb 18, 2010
Before you say use an ImageButton, this is not an option. I only have access to the client side right now.
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Mar 29, 2010
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[Code]....
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Oct 25, 2010
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$(function () {
$(document).ready(function () {
var cid = $("#CompanyId").val();
$.post("/ManifestSearch/GetFilteredFieldOffices", { id: cid }, function (data) {
$("#FieldOfficeId").loadSelect(data);
});
var fid = $("#FieldOfficeId").val();
$.post("/ManifestSearch/GetFilteredFacilities", { id: fid }, function (data) {
$("#FacilityId").loadSelect(data);
});
});
});
Now, when the page loads, everything looks fine. All the dropdownlists have the correct data.
When i change company, this calls.
$(function () {
$('#CompanyId').change(function () {
var cid = $(this).val();
$.post("/ManifestSearch/GetFilteredFieldOffices", { id: cid }, function (data) {
$("#FieldOfficeId").loadSelect(data);
});
var fid = $("#FieldOfficeId").val();
$.post("/ManifestSearch/GetFilteredFacilities", { id: fid }, function (data) {
$("#FacilityId").loadSelect(data);
});
});
});
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May 12, 2010
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<cc1:MaskedEditExtender ID="txtFee1ME" runat="server" PromptCharacter=" " Mask="999.99"
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string path = AppDomain.CurrentDomain.BaseDirectory;
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writing code for Session_Start() and Session_End() such that whenever a user closes the browser without logging out he is automatically forcely logged out......And too when a user logs out normally he is re-directed to the LogOn page....
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disable working browser back button in code behind in c# or java script.
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I faced a situation where I have to add a column in the existing GridView. The problem was, that column has to contain <asp:CheckBoxList.../>.
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[Code]....
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Feb 16, 2011
I need to force every request to https://www.mysite.com (always with https and www)
The site is hosted in GoDaddy and I need to do it via IIS7 URL Rewrite Module.
I've been able to do the HTTPS redirect with the following code:
<system.webServer>
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<match url="(.*)" />
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Oct 15, 2010
When an asynchronous postback happened inside update panel, another postback happens also for MasterPage not only update panel embedded page .
I want to prevent this MasterPage postback .
is this possible ? think like i have a MasterPage
and another page which is test.aspx which is content page of MasterPage
i have update panel at test.aspx
when asynchronous postback happens at this test.aspx update panel it also loads MasterPage Page_Load
i want to prevent this (it should not also load MasterPage Page_Load)
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Jun 8, 2010
I have 2 textboxes and a submit button inside a .net composite server control. I tried to only postback when submit button is clicked. I set autopostback = false for both textboxes. But either one still trigger submit button's onclick event by hitting "Enter" inside textbox. How can I stop postback by enter key?
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Oct 15, 2010
When an asynchronous postback happened inside update panel, another postback happens also for MasterPagenot only update panel embedded page .I want to prevent this MasterPage postback . is this possible ?think like i have a MasterPage and another page which is test.aspx which is content page of MasterPagei have update panel at test.aspxwhen asynchronous postback happens at this test.aspx update panel it also loads
MasterPage Page_Loadi want to prevent this (it should not also load MasterPage Page_Load)
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Jan 28, 2011
iam using the Jquery Uframe with asp.net project.Iam getting a postback problem here.
In side the uframe ,button control getting postback the page even the client side method call also.
i tried with the Html button Control also by setting the type="submit" ,iam facing the same problem.
And I got very limited reference about the uframe(codeflex,codeProject).
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