I have an AsyncFileUpload control inside an update panel in a page that is using a master page.
When I select a file, the client side OnClientUploadComplete fires but not the server side. I searched the issue and tried different suggestions, including adding a hidden button outside update panel and "click" it on client script to force an async postback as well as modifying the "form" tag on master page to include encrypt type but nothing seems to be working.
In aspx file I have:
<script type="text/javascript">
function onClientUploadComplete(sender, e) {debugger
var ct = e.get_contentType();
var fn = e.get_fileName();
var l = e.get_length();
var p = e.get_path();
document.getElementById('uploadCompleteInfo').innerHTML = '';
__doPostBack('upnlNews', '');
}
function onClientUploadStart(sender, e) {
document.getElementById('uploadCompleteInfo').innerHTML = 'Please wait while uploading ' + e._fileName;
}
</script>
<asp:UpdatePanel runat="server" ID="upnlNews">
<ContentTemplate>
<ajaxToolkit:AsyncFileUpload runat="server" ID="fuAttchedDocs"
ThrobberID="myThrobber"
UploaderStyle="Traditional"
OnClientUploadComplete="onClientUploadComplete"
onuploadedcomplete="fuAttchedDocs_UploadedComplete"
onuploadedfileerror="fuAttchedDocs_UploadedFileError" />
<asp:Label runat="server" ID="myThrobber" Style="display: none;">
<img align="middle" alt="" src="../assets/images/6.gif" />
</asp:Label>
<div id="uploadCompleteInfo"></div><br />
</ContentTemplate>
</asp:UpdatePanel>
Additional Info
when I put a breakpoint in client side script and check the variables in Chrome Developer Tool, I see the following:
function onClientUploadComplete(sender, e) {debugger
var ct = e.get_contentType(); ==> ct = ""
var fn = e.get_fileName(); ==> fn = "spock.jpg"
var l = e.get_length(); ==> l = "NaN"
var p = e.get_path(); ==> p = "C:\fakepath\spock.jpg"
document.getElementById('uploadCompleteInfo').innerHTML = '';
__doPostBack('upnlNews', '');
}
The fact that file length shows as NaN is a bit fishy!
I found out that the UI designer had added a Search text box and button combo and had contained them in a <form>...</form> tag; so the page two <form> tags, one contained within the other (main page form tag and this one). This broke the code. I realized that when I found that even a regular button would not fire its OnClick event. After I changed the form tags to div everything worked fine.
Related
I have a simple page with Jquery datepicker, UpdateProgress, and GridView inside of UpdatePanel.
Here is a fragment from the page:
...
Select From Date: <input type="text" id="datepickerfrom" name="datepickerfrom"/>
Select To Date: <input type="text" id="datepickerto" name="datepickerto"/>
<asp:Button ID="btnGetData" runat="server" OnClick="BtnGetData_Click" Text="Get Error List" />
<asp:UpdateProgress ID="UpdateProgress1" runat="server">
<ProgressTemplate>
<asp:Image ID="Image1" runat="server" ImageUrl="~/Images/ajax-loader.gif" />
</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
...MyGrid...
</ContentTemplate>
</asp:UpdatePanel>
...
This is the code behind method invoked when clicking on the button:
protected void BtnGetData_Click(object sender, EventArgs e)
{
string dateFrom = HttpUtility.HtmlEncode(Request.Form["datepickerfrom"]);
string dateTo = HttpUtility.HtmlEncode(Request.Form["datepickerto"]);
InputData data = new InputData(dateFrom, dateTo);
Session["inputData"] = data;
gvErrorLog.PageIndex = 0;
LoadLogErrorData(data);
}
When I first load the page and click on one of the Date's text boxes, jQuery datepicker is poped up. When I refresh the page, it pops up as well.
However, after clicking on the button and populating the GridView with the data, it is not displayed anymore.
What can be the reason?
Your tag is
<input type="text" id="datepickerfrom" name="datepickerfrom"/>
This is really the regular html tag. Microsoft ASP.NET does NOT keep the state (ie in ViewState) of regular html tag. After postback, the page life cycle effectively creates a new instance of Page (System.Web.UI.Page) object before sending response back to browser as html.
On the other hand, once you change to
<asp:TextBox ID="datepickerfrom" runat="server" />
You will see it in postback. Also the way you capture those 2 dates in code behind is obsolete (only seen in ASP 1.1).
The namespace for your text tag is
System.Web.UI.HtmlControls.HtmlInputText and the namespace for the server tag is System.Web.UI.WebControls.TextBox. They belong to different namespaces. Any controls in the HtmlControls are for legacy purpose.
You may change to asp:TextBox and access them from code behind as follows:
protected void BtnGetData_Click(object sender, EventArgs e)
{
string dateFrom = datepickerfrom.Text; // -- updated
string dateTo = datepickerto.Text; // -- updated
InputData data = new InputData(dateFrom, dateTo);
Session["inputData"] = data;
gvErrorLog.PageIndex = 0;
LoadLogErrorData(data);
}
If you insist on your tags, you can add a hidden variable and update those hidden variable on change event of your textboxes.
I assume your textboxes are set up like the following
$(function () {
$("#<%=datepickerfrom.ClientID%>").datepicker();
$("#<%=datepickerto.ClientID%>").datepicker();
});
I finally found the answer to my problem here:
http://www.jquerybyexample.net/2010/08/jquery-datepicker-does-not-work-after.html
im trying to update a variable from within an update panel:
<script type="text/javascript">
var v = 1;
</script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="btnDone" runat="server" Text="Done" onclick="btnDone_Click" />
<asp:Literal ID="litnew" runat="server"></asp:Literal>
</ContentTemplate>
</asp:UpdatePanel>
<script type="text/javascript">
function updateint() {
alert(v);
}
</script>
<input type="button" onclick="updateint()" />
code behind
protected void btnDone_Click(object sender, EventArgs e)
{
string kiss = LipImageCreator.createImage(); //this returns a file path
litnewlipsurl.Text = "<script> v = '" + kiss + "'; </script>");
}
if i click the button run the updateint() function before i hit the btnDone button i get the alert saying '1' as expected. after i click the btnDone button the javascript is written to the literal as expected but when i click the updateint() button again i still get '1' and not the filepath i was expecting....
You must use ClientScript.RegisterStartupScript() to get the ajax handler to run your script when the postback completes.
I have a form with 5 text boxes and a button, and when the button is clicked it send the data to a SQL database. I would like the button to be disabled if any of the text boxes are null, how do I do this in C#? (I am in Visual Studio 2010 ASP.NET web app)
You need to write JavaScript/jQuery code.
Yes, What Sam said is right!!
you need to check first whether all your text boxes are empty or not.
that will be done by
If(txtbox1.text == "" || txtbox2.text == "" || txtbox3.text == "" || txtbox4.text == "" || txtbox5.text == "")
If any of the text box is empty then make the button disabled.
button1.enable = false;
If all are filled then make it as enabled.
button1.enable = true;
If you do not want to use Client side scripts, you can use validations for your controls
<asp:TextBox id="TextBox1" runat="server" />
<asp:RequiredFieldValidator id="RequiredFieldValidator1"
runat="server" ErrorMessage="Required!" ControlToValidate="TextBox1" >
</asp:RequiredFieldValidator>
Validation will trigger on postbacks.
If you have multiple controls, but you do not want to validate them all, you can use Validation Group. Check this link for using Validation Groups
use javascript setInterval on Page load if if you are using this single form on the page and check each textbox value length .. if anyone is null then disable submit button..
use jquery to disable and enable them.. check following code snippet that i have created for sample..
use this to access server control id if you are using these controls inside some container control eg. panel, contentplaceholder etc : $("#<%=button1.ClientID>%>")
$("#text1").val().length will check then length of text in textbox.. and then use jquery to enable and disable them..
<head runat="server">
<title></title>
<script src="http://code.jquery.com/jquery-1.7.min.js" type="text/javascript"></script>
<%-- <script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.min.js" type="text/javascript"></script>--%>
<%--<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7-vsdoc.js" type="text/javascript"></script>--%>
<script type="text/javascript">
$(document).ready(function () {
$("#submit").attr('disabled', 'disabled');
$("#text1").keypress(function () {
check();
});
var intv = self.setInterval("check()", 1000);
});
function check() {
if ($("#text1").val().length > 0) {
$("#submit").removeAttr('disabled');
}
else {
$("#submit").attr('disabled', 'disabled');
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="text1" runat="server"></asp:TextBox>
<asp:Button ID="submit" runat="server" Text="Button" />
</div>
</form>
</body>
</html>
hi I have one parent page which opens a pop up window, and user makes some changes on child pop up page then clicks a save button.
When the user clicks the save button, I want to doPostBack to the parent page so that the changes made in the pop up window can be seen in parent window.
Question : How can I achive the above scenario?
I want to write the script code in aspx.cs file, I tried
string script = "";
script = "<script>window.opener.__doPostBack('UpdatePanel1', '')</script>";
ScriptManager.RegisterClientScriptBlock(Literal1, typeof(Literal), "yenile", script, true);
but this did not do anything, no errors just nothing.
I am new to JavaScript, need help with all steps.
The parent page:
<asp:UpdatePanel runat="server">
<ContentTemplate>
<div>
<asp:Literal runat="server" ID="ChildWindowResult" />
</div>
<hr />
<input type="button" value="Open Dialog" onclick="window.open('MyDialog.aspx', 'Dialog');" />
<asp:Button ID="HiddenButtonForChildPostback" runat="server"
OnClick="OnChildPostbackOccured" style="display: none;" />
<asp:HiddenField runat="server" ID="PopupWindowResult"/>
</ContentTemplate>
</asp:UpdatePanel>
The MyDialog page:
<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.6.1.min.js"></script>
<script type="text/javascript">
function postData() {
var resultField = $("input[type='hidden'][id$='PopupWindowResult']", window.opener.document);
var parentPosDataButton = $("[id$='HiddenButtonForChildPostback']", window.opener.document);
resultField.val($("#<%= SomeValueHiddenField.ClientID %>").val());
parentPosDataButton.click();
}
</script>
<asp:TextBox runat="server" ID="SomeValueHiddenField" />
<asp:Button runat="server" OnClick="PostData" Text="Click Me" />
protected void PostData(object sender, EventArgs e)
{
SomeValueHiddenField.Value = DateTime.Now.ToString();
ClientScript.RegisterStartupScript(this.GetType(), "PostData", "postData();", true);
}
But I believe that it would be much better to utilize here some pop-up controls like PopUpExtender from the AjaxControlToolkit library or dialog from the jQuery-UI.
You probably need to use ClientID:
string script = "";
script = "<script>window.opener.__doPostBack('" + UpdatePanel1.ClientID + "', '')</script>";
ScriptManager.RegisterClientScriptBlock(Literal1, typeof(Literal), "yenile", script, true);
The last parameter is to whether include script tag or not
So, if you do
RegisterClientScriptBlock(page,type, "<script>foo();</script>", true);
You will end up with:
"<script><script>foo();</script></script>"
So, change your last parameter to false, or better yet, remove the tags in the string
Review the following suggested solution:
http://livshitz.wordpress.com/2011/06/12/use-popup-to-postbackupdate-its-parentopener-without-losing-viewstate-values-and-close/#more-16
I have two text boxes I need a functionality like If I am typing in 1st text box The text should be getting displayed in 2nd text Box with some other font. This is a web Application. And so Text Box doesn't have OnKeyDown event? Do you suggest any way to implement this?
Note: I don't want to implement this with Javascript.
Solution using an asp:UpdatePanel
With this approach, you don't need to write a single line of JavaScript by yourself; everything is handled by the control.
Page.aspx:
<asp:ScriptManager runat="server"></asp:ScriptManager>
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:TextBox runat="server" ID="text1" OnTextChanged="text1_TextChanged"></asp:TextBox>
<asp:TextBox runat="server" ID="text2" class="special"></asp:TextBox>
</ContentTemplate>
</asp:UpdatePanel>
Event handler for the TextChanged event, Page.aspx.cs:
protected void text1_TextChanged(object sender, EventArgs e) {
text2.Text = text1.Text;
}
Solution using ASP.NET and jQuery
Page.aspx:
<script type="text/javascript">
//As soon as the DOM is ready, execute the anonymous function
$(function () {
var textBox1 = $("#<%= text1.ClientID %>");
var textBox2 = $("#<%= text2.ClientID %>");
textBox1.keyup(function () {
textBox2.val(textBox1.val());
});
});
</script>
<asp:TextBox runat="server" ID="text1"></asp:TextBox>
<asp:TextBox runat="server" ID="text2" class="special"></asp:TextBox>
CSS for both approaches:
.special { font-family: YourFontFamilyOfChoice; }
Test Results
I've tested both solutions locally with Firefox 3.6, Opera 10.6, and Internet Explorer 8; both work like a charm.
Use jQuery (JavaScript) combined with CSS. This solution will not trigger a post-back: Your users will see stuff happen as they type.
CSS:
.normalFont { font-family: Arial; }
.alternateFont { font-family: Verdana; }
HTML:
<input ... class="normalFont" />
<input ... class="alternateFont" />
JavaScript (jQuery):
// When the DOM is ready, execute anonymous function
$(function ()
{
// store a reference for the input with the "alternateFont" class
var alternateFontInput = $("input.alternateFont")[0];
// execute anonymous function on key-up event on the input with
// the "normalFont" class
$("input.normalFont").keyup(function ()
{
// set the value of the input with the "alternateFont" class to
// the value of the input with the "normalFont" class (this)
alternateFontInput.value = this.value;
});
});