I have a fileupload control in a web page. I upload one file to the fileupload control. I am having the path like c://images/image.jpg. But if change dropdown value,then i am losing the value in the fileupload control. How to get back the value?
View 32 Replies
I have many file upload controls in my web page. In this page is a add button that create dynamic controls in table rows. Every table row has a file upload control. When this button clicks, post back occurs and all file upload controls content fly and user have to select all of them. What should I do for keep FileUpload content after post back?
View 7 RepliesI have color attributes set to some items in dropdownlist on Page Load.
Dim li As New ListItem("heading" , "0"))
li.Attributes.Add("style", "font-weight:bold")
however, it loses after Post Back, ie., on SelectedIndexChanged event.
I populate two dropdownlist in asp.net. Both are assigned to a required field validator.
The codebehind is as below
[Code]....
the designer code is as below
[Code]....
Now what happens is, when i choose a field from the dropdown and once again when i choose the "-- Select--", the validator appears and then disappears.Where am I going wrong?Why doesnt the validator stay?RegardsHema
I have four textbox and a button in my page. After filling the textbox. When the user click save button. A loading image should be displayed. User should not feel that the page is postback to the server,Some thing like in facebook loading image.
View 5 RepliesASP.NET Ajax Library provides some client-side events. For instance:
Sys.Application.add_load(
function(args) {
// handle the end of any asynchronous post-back. Every-time there's
// a server round-trip, this method will be called.
}
);
During the asynchronous post-back I want to retrieve information to the client. This information must be available in some event like the discribed above.
Does the UpdatePanel or the ScriptManager have any server-side way to retrieve data back to client during an asynchronous post-back?
i have tow dropdownlists in formview when i select from the first dropdownlist i take the value and postback to the same page with this line response.redirect("addtabs.aspx?SECID="+dropdownlist1.selected value.tostring())and thi second dropdownlist take th SECID and fill it self with sqldatasource with this parameter every thing okbut when post back the first dropdownlist doesn't select my choise but select the first item in it how can i make it still select my selection.
View 1 RepliesI populate two dropdownlist in asp.net. Both are assigned to a required field validator.
The codebehind is as below
if (!Page.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.Add("emp");
dt.Columns.Add("ename");
[Code]....
Now what happens is when I choose a field, and then once again go and choose"-- Select--", the validator appears and disappears.
Why doesnt the validator stay? Where am I going wrong?
Being new to ASP.NET I have run into trouble building my own Whack-a-mole program. I think my problem comes from using Buttons, which by themselves send post backs to the server, making the software unusable. The looks are in place, making new buttons show up in the grid, in different places by random. However, when a button is pushed - the score doesn't change (which I feel is strange).
Not so strange is that the Button doesn't work since it sends post back to the server - reloading the UpdatePanel. I think I should use a different controller like the CheckBox and style it hard using CSS (which isn't a problem). Is this the correct way to go, or should I make use of JavaScript AJAX instead?
Note to self: This technique shouldn't be used in a public application since it put too much unwanted pressure on the web server.
[code]...
How to display wait image when data is being populate into one drop down based on selection of another dropdown inside update panel....
View 1 RepliesUsing Vb.Net 2003 Asp.Net 1.1
I have a dynamic data bound drop down list, when the user selects thier selected item I have to use the autopostback feature.
Problem is: when the page comes back it is at the top of the page not where i have the control.
I don't really need it to focus back on the dropdownlist but to scroll to it, I want to do it in the code behind.
Any "New" ways to do it, I mean new as in code from like 2010 instead of old code from the early days.
I really don't want to use Page.Register new Script...... code if I can avoid it.
What would be cool is a ScrollToControl() Function for my code behind that worked but didn't register script.
I have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?
View 1 RepliesI have a very odd and disconcerning problem. Just recently a page where I have 1 textbox and a buttoon has ceased to work.
When I look at the post coming into the PageLoad, the pageType is "POST", but the Page.IsPostBack is false!! and the textbox (which had content) is empty.
I have stripped all AJAX script out, so I have a very vanilla page (in a master page) being served.
The pages is
[Code]....
[Code]....
The page is "POST", but isPostback is false[Code]....
[Code]....
I searched google and found asynchronise post back trigger is used if we want update panel to post back on some event of control if it is out side the update panel. Than what is purpose of post back trigger ?
View 2 RepliesI got creating album feature, it require user to enter data of new album name, description, and upload a profile picture. I can do everthing perfectly fine, but wat i wan to do is, if the user did not select any file to upload, which means they do not wan to put a profile pic for that album, i wan to take the "noimage.gif" from the folder and set it to the FileUpload path, because i wanted to store that image into database, therefore i need to retrieve that image first and then convert it into bitmap and then to bytes with a method im using now
View 7 RepliesBeginner question:
I'm not sure if this is specific to Telerik's plug-in I'm trying to use or if it's a 'generic thing' I'm doing wrong ?
I have a RadTextBox:
<telerik:RadTextBox ID="RadTextBox1" Runat="server" name="nameTest"/>
And I have an ASP button that run this code:
Dim a As String = Request.Form("nameTest")
Dim b As String = Request.Form("RadTextBox1")
Both a and b always remain null.
Questions
- How do I get postback values from Rad/components ?
- How do I get postback values from Rad/components when they are in user control ?
I Had two webforms. source.aspx & Target.aspxSuorce.aspx has 2 textboxes for input data and two submit buttons. am using cross page technique to transfer data from one webform to other.ource Page:On buton click event :
Server.Transfer("TargetHome.aspx");
= null)
{
TextBox TextBox1 = PreviousPage.FindControl("TextBox1") as TextBox;
if (TextBox1 != null)
[code]...
I am confused about the new request of asp.net page and the Post back! what is the difference between them? when we click on any control like button the post-back is called for the same page! why it is no re-requested or so on.?
View 6 Replies1) The web application I'm building is a person enters information and the categories are selected by using checkboxes. The input page I have checkboxlist and it enters correctly has a one line to the database. For example, when they check one of the following Red, Blue, Orange and brown, they appear as one line in the database. When they do a search on the individual I need the checkboxes to return that they were selected when it returns information from the database so they update the information or deselect a color or something. Do I need a autopostback on the checkboxlist?
2) Is it possible to have a search page base on checkboxes. For example, the user checks red, and blue. Clicks on the search button. On a gridview every person who checked red and blue when they first entered information will appear in the gridview. Do I need a checkbox result table with a bit field?
I'm not sure which way I should go with this. Just asking for a direction in how I can do this.
i am thinking to capture which button has caused a postback in the web pages.
Is it possible to do so?
I have orders page. When user submit Order, I need to disable the button to avoid multiple transactions. I also have few validation controls on the page, so button should not be disabled untill page is about to be posted. I dont have any custom javascript for validation. It is just these asp.net validation controls. What is the best way to achieve that? I have spend about 2 hours on google and found various solutions, but nothing seems to work. Each has some issue. On button I add OnClientClick="return btnOnClick this, 'Payment');" Below is what gets called. Unfortunately if I disable button, it cancels post back. So I am calling dopostback and also adding few lines on server side to see which button caused postback. It works fine in IE8 and Chrome. But for Firefox on server side arg comes null. Any ideas what is wrong with my code? Or any other suggestions to do it in a better way?
C# Server side
string arg = this.Request.Params.Get("__EVENTTARGET");
if (arg == "Payment") { this.ProcessPayment(); }
Button
<asp:Button ID="btnSubmitPO" OnClientClick="return btnOnClick(this, 'Payment');" runat="server" Text="Submit Order" ValidationGroup="G" />
alert(group);
How to change from button post back to autopostback
[Code]....
I have created a listbox that the selected items would remove by using javascript once I clicked on a server button. Below is the code I'm using
<asp:button id="btnSelected" Runat="server" CssClass="InputFormObject" Text=">" ></asp:button>
<script language="javascript">
function removeOptions(selectbox)
{
var i;
for(i=selectbox.options.length-1;i>=0;i--)
{
if(selectbox.options[i].selected)
selectbox.remove(i);
}
return false;
}
</script>
private void Page_Load(object sender, System.EventArgs e).......................
I have an aspx page for Search Options. There are three aspx Dropdown List Controls that are each bound to seperate data sources. The selection made in the Dropdown control is used in a SQL Query within a GridView data source to display the results list.
When I select an item from the drop down list I get the search result, but I want the drop down list to return to it's initial state after it displays the result, so the next selection made will clear the results list from the first selection. I have tried a number of different approaches, but no success. Seems like this should be easy, but I'm new to coding.
I have found a couple of possibles on the forum, but they didn't work. Not sure if you can make any sense of this, but I'll try to give you something more to go on. All I really want to do is reset the dropdown after it displays the results of the search, which I assume is after a PostBack. Here is what I have tried in the Code Behind or Script.
This for just one of the Dropdown Lists, ID=Practices. I have been trying to make this work for way too long. Also, I have tried it with AutoPostBack set to true but same problem. Currently have a 'Submit" button on the page to initiate the search.
[code]....
In my project I used a dropdown list which databind as follows:
My drop downlist code as follows:
[code]....
* My proble is when I Change the Index Selection My dropdownlist automatically post back and it loses its Selected Index and move to Index=0
* When I press any server control e.g. button it also behave as previous.
