Develop Reference

asp.net with jquery error

i try to get an image inside dropdownlist using jquery and it's work fine with me. my code
<script type="text/javascript" src="msdropdown/js/jquery-1.6.1.min.js"></script>
<script type="text/javascript" src="msdropdown/js/jquery.dd.js"></script>
<link rel="stylesheet" type="text/css" href="msdropdown/dd.css" />
<!-- Script is used to call the JQuery for dropdown -->
<script type="text/javascript" language=”javascript” >
$(document).ready(function (e) {
try {
$("#ddlanguage").msDropDown();
}
catch (e) {
alert(e.message);
}
});
</script>
dropdownlist:
<asp:DropDownList ID="ddlanguage" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddSelLang_SelectedIndexChanged">
<asp:ListItem Value="en-US" Text="English"></asp:ListItem>
<asp:ListItem Value="ar-OM" Text="عربي"></asp:ListItem>
</asp:DropDownList>
and in C#
protected void BindFlag()
{
if (ddlanguage != null)
{
foreach (ListItem li in ddlanguage.Items)
{
li.Attributes["title"] = "Images/Flag/" + li.Value+".gif"; // setting text value of item as tooltip
}
}
}
so everything work fine and i get image inside the list, but the problem when i try to lode some webpage use specific javascript or jquery it will give me an error message:
one page have jquery with javascript display this error :Object doesn't support property or methode 'msDropDown'
another page i only use javascript in it, it will close and display this message 0x800a1391 - JavaScript runtime error: '$' is undefined.
and there other problems: if there some action in some page, image will hided
could any one help me in that?
thanks

Columnwise filter with dropdown in asp.net gridview using DataTable.js

DataTable.js provides Columnwise Search with Dropdown as shown here.
I have made exact demo here using HTML,CSS,JS only which also works fine.
Now, In my asp.net webforms project I have integrated DataTable.js that works perfectly fine.
How have I done it? here it is,
gridview.aspx
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
<link href="Content/DataTables/css/dataTables.jqueryui.css" rel="stylesheet" />
<script src="https://code.jquery.com/jquery-1.12.0.min.js"></script>
<script src="https://cdn.datatables.net/1.10.10/js/jquery.dataTables.min.js"></script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="FeaturedContent" runat="server">
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="MainContent" runat="server">
<asp:GridView ID="GridView1" runat="server" CssClass="gvdatatable" AutoGenerateColumns="true" OnPreRender="GridView1_PreRender"></asp:GridView>
<script>
$(document).ready(function () {
$('#<%=GridView1.ClientID%>').DataTable({
initComplete: function () {
this.api().columns().every(function () {
var column = this;
var select = $('<select><option value=""></option></select>')
.appendTo($(column.footer()).empty())
.on('change', function () {
var val = $.fn.dataTable.util.escapeRegex(
$(this).val()
);
column
.search(val ? '^' + val + '$' : '', true, false)
.draw();
});
column.data().unique().sort().each(function (d, j) {
select.append('<option value="' + d + '">' + d + '</option>')
});
});
}
});
});
</script>
</asp:Content>
gridview.aspx.cs
protected void GridView1_PreRender(object sender, EventArgs e)
{
if (GridView1.Rows.Count > 0)
{
GridView1.UseAccessibleHeader = true;
GridView1.HeaderRow.TableSection = TableRowSection.TableHeader;
GridView1.FooterRow.TableSection = TableRowSection.TableFooter;
}
}
Everything works fine. Just the problem is it doesn't show dropdown with values at bottom. Is there something I'm missing?
How to do it?
Help would be greatly appreciated.
Extra Notes:
Recently figure out that, in DataTable example, it has
<tfoot>
<tr>
<th>Name</th>
<th>Position</th>
<th>Office</th>
<th>Age</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</tfoot>
when I check console, gridview's <tfoot> is empty. I think there some magic is needed.

Inside
<asp:GridView />
you need
showfooter="true"

SAP UI5 with ASP: Repeater Control

Does anyone know how to use an sap ui5 control with the asp:repeater control. Everytime I try to put a button, it only shows up in the first iteration of the repeater. And not in the rest of the iterations
<asp:Repeater ID="NewsFeedID" runat="server" >
<ItemTemplate>
<script type="text/javascript">
var buttonlink = CommentsPage + "?news=" + '<%# Eval("NewsFeedID") %>';
var AddComment = new sap.ui.commons.Button({
text: "Add Comment",
icon: AddCommentIcon,
lite: true,
press: function () { window.location = buttonlink; }
}).placeAt("Comments");
</script>
<div id="Comments"></div>
</td>
</tr>
When I use this code it only shows up for the first iteration of the asp:repeater but I want it to show up for all iterations. Does it have something to do with the div id=Comments? Need help please

Your Repeater creates multiple <div> elements with the same id, which causes conflicts.
One way to fix the problem is to add a runat="server" attribute to the <div>, making it a server-side control so that ASP.NET generates a unique ID for each instance:
<div runat="server" id="Comments"></div>
Then pass the dynamically generated ID to the placeAt function:
}).placeAt("<%# Container.FindControl("Comments").ClientID %>");

You can rename every instance with the index of repeater item:
<script type="text/javascript">
var buttonlink = CommentsPage + "?news=" + '<%# Eval("NewsFeedID") %>';
var AddComment = new sap.ui.commons.Button({
text: "Add Comment",
icon: AddCommentIcon,
lite: true,
press: function () { window.location = buttonlink; }
}).placeAt("<%# "Comments"+ Container.ItemIndex+1 %>");
</script>
<div id="<%# "Comments"+ Container.ItemIndex+1 %>"></div>

Async postback not working

I'm using this gauge in my contentplaceholder.
http://www.dariancabot.com/projects/jgauge_wip/
MyControl.ascx:
<link rel="stylesheet" href="Scripts/jgauge.css" type="text/css" />
<script type="text/javascript" src="Scripts/jquery-1.8.0.js"></script>
<script language="javascript" type="text/javascript" src="Scripts/jgauge-0.3.0.a3.js"></script>
<script language="javascript" type="text/javascript" src="Scripts/jQueryRotate.2.2.js"></script>
<script language="javascript" type="text/javascript" src="Scripts/excanvas.min.js"></script>
<div id="<%=this.ClientID%>_ctl" class="jgauge" ></div>
<script type="text/javascript">
$(document).ready(function () {
var isPostBack = <%= Page.IsPostBack ? "true" : "false" %>;
if(isPostBack == "true")
{
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
prm.add_endRequest(onEndRequest);
}
else{
var <%=this.ClientID%>_ctl;
<%=this.ClientID%>_ctl = new jGauge();
<%=this.ClientID%>_ctl.id = '<%=this.ClientID%>_ctl';
<%=this.ClientID%>_ctl.init();
}
});
function EndRequestHandler(sender, args){
var <%=this.ClientID%>_ctl;
<%=this.ClientID%>_ctl = new jGauge();
<%=this.ClientID%>_ctl.id = '<%=this.ClientID%>_ctl';
<%=this.ClientID%>_ctl.init();
}
</script>
In MyPage.aspx: (Contains dynamically created table having several such controls. putting the generated table on placeholder)
<asp:UpdatePanel ID="up1" runat="server">
<ContentTemplate>
<asp:PlaceHolder id="phMain" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="myBtn" />
</Triggers>
</asp:UpdatePanel>
<asp:Button ID="myBtn" runat="server" Text="Refresh" />
I have script manager on master page:
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true"></asp:ScriptManager>
But after async postback (hitting 'myBtn'), gauge disappears. Please Help. Trying to solve it since couple of days.

I was able to solve this with by going:
$(document).ready(function () {
Sys.WebForms.PageRequestManager.getInstance()
.add_endRequest(<%=this.ClientID%>_ctlEndRequestHandler);
var <%=this.ClientID%>_ctl;
<%=this.ClientID%>_ctl = new jGauge();
<%=this.ClientID%>_ctl.id = '<%=this.ClientID%>_ctl';
<%=this.ClientID%>_ctl.init();
});
function <%=this.ClientID%>_ctlEndRequestHandler(sender, args){
var <%=this.ClientID%>_ctl;
<%=this.ClientID%>_ctl = new jGauge();
<%=this.ClientID%>_ctl.id = '<%=this.ClientID%>_ctl';
<%=this.ClientID%>_ctl.init();
}
The only real difference is that the postback checks are no longer taking place. Your underlying problem is that $(document).ready will not fire on partial postbacks, which means that isPostBack is never actually getting set to true. Because of this, Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler); was never executing, meaning that your EndRequestHandler never ran.
Edit
The other issue is that naming the method EndRequestHandler is guaranteed to cause problems if you have more than one of the control at the same time. To get around this, I appended <%=this.ClientID%>_ctl to the name of EndRequestHandler to ensure it was unique.
More info:
How do I use a jQuery $(document).ready and an ASP.NET UpdatePanel together?
http://encosia.com/document-ready-and-pageload-are-not-the-same/

Check all CheckBoxes in GridView

I have a GridView in ASP.NET/C# with a CheckBoxField, a BoundField and 2 ButtonFields. All 4 of them has a header to make clear where the column stands for. At the Page_Load event I set the ВataЫource of the GridView to my filled DataTable.
I want to make it easier to use for the user, and want to make a checkbox in the header. When that checkbox is checked by the user, all CheckBoxes should be checked in the GridView. I have set the HeaderText of the CheckBoxField to <input type='checkbox' />, and it shows a checkbox in the header now.
Now I want to add a function to that checkbox, that when it's checked, all CheckBoxes will be checked en vice versa. I tried to do it with jQuery, but it didn't work because I can't find a way to give all the CheckBoxes in the GridView the same ID or NAME.
Is there a event that occurs when I check the HTML based checkbox within the header? If yes, which event?
If no, how can i trigger a event when I check that checkbox, and change the GridView from my code-behind.
And if none of that is possible, how can i do it on another way, with javascript, jQuery or maybe with a ASP.net control.
I hope you can help me with this, but please don't expect i'm a code guru. I'm a intern at a company where the need a system, with this functionality.
Update:
Thank you everyone for helping me out. What is the easiest way to get the DataSource back into the DataTable, because i need to know which rows were selected and which were not?

Using jQuery, you get all the check boxes inside the GridView, and then for each one you change the status as you like. You call this javascript function from onclick of a link or a button, or what ever you like.
function CheckAll()
{
var updateButtons = jQuery('#<%=gvGridViewId.ClientID%> input[type=checkbox]');
updateButtons.each( function() {
// use this line to change the status if check to uncheck and vice versa
// or make it as you like with similar function
jQuery(this).attr("checked", !this.checked);
});
}

try this code according to you
in grid view
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="headerchkbox" runat="server" CssClass="chkheader" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="CheckBoxAssign" runat="server" CssClass="chkitems" />
</ItemTemplate>
</asp:TemplateField>
java script
<script type="text/javascript">
$(window).bind('load', function () {
var headerChk = $(".chkheader input");
var itemChk = $(".chkitems input");
headerChk.bind("click", function () { itemChk.each(function () { this.checked = headerChk[0].checked; })
});
itemChk.bind("click", function () { if ($(this).checked == false) headerChk[0].checked = false; });
});
</script>

Here is a sample I have put together for you.
ASPX
<head runat="server">
<title></title>
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
var allCheckBoxSelector = '#<%=GridView1.ClientID%> input[id*="chkAll"]:checkbox';
var checkBoxSelector = '#<%=GridView1.ClientID%> input[id*="chkSelected"]:checkbox';
function ToggleCheckUncheckAllOptionAsNeeded() {
var totalCheckboxes = $(checkBoxSelector),
checkedCheckboxes = totalCheckboxes.filter(":checked"),
noCheckboxesAreChecked = (checkedCheckboxes.length === 0),
allCheckboxesAreChecked = (totalCheckboxes.length === checkedCheckboxes.length);
$(allCheckBoxSelector).attr('checked', allCheckboxesAreChecked);
}
$(document).ready(function () {
$(allCheckBoxSelector).live('click', function () {
$(checkBoxSelector).attr('checked', $(this).is(':checked'));
ToggleCheckUncheckAllOptionAsNeeded();
});
$(checkBoxSelector).live('click', ToggleCheckUncheckAllOptionAsNeeded);
ToggleCheckUncheckAllOptionAsNeeded();
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server">
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="chkAll" runat="server" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkSelected" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
C#
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
List<string> lstObjects = new List<string> { "aaa", "bbb" };
GridView1.DataSource = lstObjects;
GridView1.DataBind();
}
}
If you are using the latest version of jQuery (1.7)
Use the following:
<script type="text/javascript">
var allCheckBoxSelector = '#<%=GridView1.ClientID%> input[id*="chkAll"]:checkbox';
var checkBoxSelector = '#<%=GridView1.ClientID%> input[id*="chkSelected"]:checkbox';
function ToggleCheckUncheckAllOptionAsNeeded() {
var totalCheckboxes = $(checkBoxSelector),
checkedCheckboxes = totalCheckboxes.filter(":checked"),
noCheckboxesAreChecked = (checkedCheckboxes.length === 0),
allCheckboxesAreChecked = (totalCheckboxes.length === checkedCheckboxes.length);
$(allCheckBoxSelector).attr('checked', allCheckboxesAreChecked);
}
$(document).ready(function () {
$(allCheckBoxSelector).click(function () {
$(checkBoxSelector).attr('checked', $(this).is(':checked'));
ToggleCheckUncheckAllOptionAsNeeded();
});
$(checkBoxSelector).click(ToggleCheckUncheckAllOptionAsNeeded);
ToggleCheckUncheckAllOptionAsNeeded();
});
</script>