I have placed a user control inside update panel after doing asynchronous postback of page associated js file of that user control is not working so that is there any method to exclude a control from updatepanel in another word i don't want to post that user control.
<asp:UpdatePanel ID="upPnlAnswerList" runat="server">
<ContentTemplate>
// another code that required to placed inside updatepanel
<div id="miancontainer" class="containerr"
<klmsuc:Share ID="shareUserControl" runat="server" />
// another code that required to placed inside updatepanel
</div>
Use a PostBackTrigger to perform exclusion rather than having to specify a large number of includes.
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:LinkButton ID="lnkExport" runat="server" OnClick="lnkExport_Click" Text="Export Data"></asp:LinkButton>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="lnkExport" />
</Triggers>
</asp:UpdatePanel>
Set UpdateMode=Conditional and provide exclusive Triggers for the UpdatePanel.
See:
http://msdn.microsoft.com/en-us/library/bb386454.aspx
you must add some controls in code behind and in the right event and register it for exclusion(postback) instead and AsyncPostBack which is a ajax call.
ScriptManager.GetCurrent(this).RegisterPostBackControl(btnAdd);
https://stackoverflow.com/a/23036830/184572
protected void grdExpense_RowCreated(object sender, GridViewRowEventArgs e)
{
LinkButton btnAdd = (LinkButton)e.Row.Cells[0].FindControl("btnAdd");
if (btnAdd != null)
{
ScriptManager.GetCurrent(this).RegisterPostBackControl(btnAdd);
}
}
look for another similar page which excludes all the controls in a gridview
http://www.aspsnippets.com/Articles/Assign-PostBack-Trigger-Full-PostBack-for-LinkButton-inside-GridView-within-AJAX-UpdatePanel-in-ASPNet.aspx
private void RegisterPostBackControl()
{
foreach (GridViewRow row in GridView1.Rows)
{
LinkButton lnkFull = row.FindControl("lnkFull") as LinkButton;
ScriptManager.GetCurrent(this).RegisterPostBackControl(lnkFull);
}
}
Related
DropDownList's SelectedIndexChanged() Event fills the ListBox on the page. Obviously this posts the page back to the server. Is there any way to make it happen without full postback?
protected void ddlTablo_SelectedIndexChanged(object sender, EventArgs e)
{
List<string> list = new List<string>();
ListBox1.Items.Clear();
var columnNames= from t in typeof(Person).GetProperties() select t.Name;
foreach (var item in columnNames)
{
list.Add(item);
}
ListBox1.DataSource = list;
ListBox.DataBind();
}
You could put the DropDownList into an <asp:UpdatePanel> and set the trigger to the SelectedIndexChanged event of the DropDownList.
Something like this (don't forget the script manager)
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:DropDownList ID="drop1" runat="server" OnSelectedIndexChanged="ddlTablo_SelectedIndexChanged" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostbackTrigger ControlID="drop1" EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
You can send ajax call, using asp.net UpdatePanel or use jQuery ajax. This wont do postback and your whole page wont get refreshed.
The UpdatePanel is quite straight forward and easy to use. ASP.net ajax will generate the asyn calls for you whereas jQuery ajax will probably need you to render html using javascript.
In the code snippet below, add this parameter: AppendDataBoundItems="True"
<asp:DropDownList ID="ddlGroupNameFilter"
runat="server"
AutoPostBack="true"
AppendDataBoundItems="true"
OnSelectedIndexChanged="ddlLeadgroupName_SelectedIndexChange">
</asp:DropDownList>
I am doing a project in asp.net. i have a panel which contains some field like txtbox ,buttons etc..I want to use jquery event on a asp.net button click which will open this panel by using jquery show() function and also perform some tasks in server side. Please help me.
The code is :
protected void btninsertfordeo_Click(object sender, EventArgs e)
{
// GridViewforcontact.Enabled = false;
PanelForInsert.Visible = true;
colvisible = true;
txtfaxnoextra.Focus();
if (colvisible == true)
{
GridViewforcontact.Columns[9].Visible = false;
}
colvisible = false;
}
You can use the OnClientClick property of the button to call your client-side function and OnClick to call your server code
<asp:Button ID="btninsertfordeo" runat="server" OnClientClick="functionToShowPanel()" OnClick="hlkContinue_Click" Text="Click"></asp:Button>
<script>
functionToShowPanel(){
$('#pnlToShow').show()
}
</script>
or without using OnClientClient you can probably do:
$('#<%=btninsertfordeo.ClientID %>').click(function(){
$('#pnlToShow').show()
}
Another option would be to use an UpdatePanel instead of jquery to show/hide elements on the page. This way you can control the visibility of your div from your code-behind. Add all the dynamic elements within the UpdatePanel's ContentTemplate and add your button as an AsynPostbackTrigger for the UpdatePanel to enable dynamic updating of our page.
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btninsertfordeo" EventName="click" />
</Triggers>
<ContentTemplate>
<asp:Panel ID="PanelForInsert" runat="server" Visible="false">
//Your textboxes, buttons etc goes here
</asp:Panel>
<asp:Button ID="btninsertfordeo" runat="server" Text="Click" OnClick="btninsertfordeo_Click"></asp:Button>
</ContentTemplate>
</asp:UpdatePanel>
Here are links to documentation that will help you in understanding and implementing an UpdatePanel:
Introduction to the UpdatePanel
UpdatePanel Control Overview
UpdatePanel Class
I have a ListView that's inside a UpdatePanel, UpdateMode = Conditional. It's a really large Listview, lots of templates, so I'm not showing details.
<asp:UpdatePanel ID="updListView" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:ListView ID="lstvScanPreview" runat="server" OnItemDataBound="lstvScanPreview_ItemDataBound">
...
</ContentTemplate>
</asp:UpdatePanel>
I also have a radiobutonlist outside of the update panel with a OnSelectedIndexChanged of
protected void rgbShowIssues_SelectedIndexChanged(object sender, EventArgs e)
{
if (rgbShowIssues.SelectedIndex == 0)
lstvScanPreview.DataSource = previewData.Data.Where(S => S.IssueType != ScanIssues.None);
else
lstvScanPreview.DataSource = previewData.Data;
updListView.Update();
}
A breakpoint set inside this method does get hit, but the listview doesn't refresh. Other controls also have events with code-behind that call updListView.Update(), and these do work. If I trigger one of these other events after I clicking on the rgbShowIssues radiobuttonlist, then when the update does occur, I can see the changes I would have expected had the UpdatePanel refreshed when expected.
Any ideas why this isn't working? Thanks.
I have an ASP page with an asp:DropDownList (with AutoPostBack="true") so that when the user changes it, it reload the appropriate data.
Under that control i have a list of UserControls, that includes a tinymce editor (tied to an asp:TextBox) and an asp:ImageButton to save the data.
When clicking on the ImageButton, the applications send the postback data via ajax to the same page (__EVENTARGUMENT, __EVENTTARGET, etc...). Why does it load that ajax page, and how do i prevent it? I'm updating the value in the DB in the OnClick event handler on the ImageButton, so all I need to do, is get ride of that ajax call.
Any ideas?
Solution 1
<asp:ImageButton ID="btn" runat="server" ImageUrl="~/images/yourimage.jpg"
OnClientClick="return false;" />
OR
Solution 2
<asp:ImageButton ID="btn" runat="server" ImageUrl="~/images/yourimage.jpg"
OnClientClick="yourmethod(); return false;" />
In addition (solution 2), your javascript method may be in this form
<script type="text/javascript">
function yourmethod() {
__doPostBack (__EVENTTARGET,__EVENTARGUMENT); //for example __doPostBack ('idValue',3);
}
</script>
in code behind
protected void Page_Load(object sender, System.EventArgs e)
{
if (this.IsPostBack) {
string eventTarget = this.Request("__EVENTTARGET") == null ? string.Empty : this.Request("__EVENTTARGET");
string eventArgument = this.Request("__EVENTARGUMENT") == null ? string.Empty : this.Request("__EVENTARGUMENT");
}
}
You've not stated you're using an UpdatePanel but this is presumably how you've implemented ajax calls. If so you need to add a trigger to exclude the imagebutton event from ajax:
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:PostBackTrigger ControlID="ImageButton" />
</Triggers>
<ContentTemplate> </ContentTemplate>
</asp:UpdatePanel>
I have a user control which contains some buttons and a placeholder. Those buttons cause controls to be added/removed from placeholder. Everything works fine.
Now I want to put this user control in a page, and wrap it in an updatepanel like so:
<asp:UpdatePanel ChildrenAsTriggers="true" ID="UpdatePanelFoo" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<grid:tablegrid ID="tablegrid_chapters" runat="server" SomeProperty="bar" />
</ContentTemplate>
</asp:UpdatePanel>
When I run the page, it's still doing a full postback when I hit one of the buttons inside the user control. What am I doing wrong, and how can I remedy this?
Update:
protected void Page_Init()
{
ScriptManager scr = ScriptManager.GetCurrent(this.Page);
Response.Write("EnablePartialRendering: " + scr.EnablePartialRendering);
}
Outputs "EnablePartialRendering: true"
Make sure you have EnablePartialRendering=true on your ScriptManager in the page.
Update
It looks like your UserControl has no events to be looking for...you have 2 options here. Move the UpdatePanel inside the UserControl .ascx so it can see the button events as children to rig up or add an event for it to see, to do that try something like this:
public event EventHandler Click;
void btn_del_Click(object sender, EventArgs e)
{
if (NumberOfRowControls > 0)
{
var rowToWhack = panel_rows.Controls.Children().Single(x => x.ID == "myrow" + (NumberOfRowControls - 1));
panel_rows.Controls.Remove(rowToWhack);
NumberOfRowControls--;
}
if(Click != null) Click(this, e);
}
void btn_add_Click(object sender, EventArgs e)
{
var row = NewRow(NumberOfRowControls);
panel_rows.Controls.Add(row);
if(Click != null) Click(this, e);
}
And update the UpdatePanel to be looking for it:
<asp:UpdatePanel ID="UpdatePanelFoo" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<grid:tablegrid ID="tablegrid_chapters" runat="server" SomeProperty="bar" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="tablegrid_chapters" EventName="Click">
</Triggers>
</asp:UpdatePanel>
Make sure you add a ScriptManager as well to the page, otherwise there's no UpdatePanel functionality.