I have an update panel on a page, and am using __doPostBack on a control inside the updatepanel called from javascript to do a postback and update the panel.
Everything works fine, until I set enableviewstate=false on the page.
The javascript still fires, but nothing happens on the server side.
well i don't understand but where lies your problem but this worked for me with a quick code
<div>
<asp:ScriptManager ID="sm" runat="server" EnablePageMethods="true" EnablePartialRendering="true">
</asp:ScriptManager>
<div id="result">
<asp:UpdatePanel runat="server" EnableViewState="false" ID="udpnl" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button runat="server" ID="btn" Text="UnClicked" OnClick="btn_click" />
</ContentTemplate>
</asp:UpdatePanel>
<input type="button" value="DoPartialPost" onclick="__doPostBack('btn','')" />
</div>
The code behind
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btn_click(object sender,EventArgs e)
{
btn.Text = "Clicked";
udpnl.Update();
}
Related
<asp:UpdatePanel ID="showsDatalistPanel" runat="server" Visible="false" UpdateMode="Always">
<ContentTemplate>
<div>
<asp:DropDownList ID="dateTimeFilter" CssClass="dateTimeFilterIdentifierCls" runat="server"
onclick="dateTimeFilter_SelectedIndexChanged" AutoPostBack="true" Visible="true" ClientIDMode="Static">
</asp:DropDownList>
<label id="dateTimeFilterLabel" runat="server" style="padding-left: 15px" visible="false">
בחירת מופע לפי תאריך
</label>
</div>
how can I call server side function on clicking the dropdown?
Thanks
If you really want to use click event then you have to simulate it using JS as DropDownList doesn't have build-in onclick functionality:
<asp:DropDownList ID="dateTimeFilter" CssClass="dateTimeFilterIdentifierCls" runat="server"
onclick="__doPostBack('dateTimeFilter', null);" AutoPostBack="true" Visible="true" ClientIDMode="Static">
</asp:DropDownList>
and then in your server code you have modify page load event accordingly:
protected void Page_Load(object sender, EventArgs e)
{
if(Page.IsPostBack)
{
if(Request.Params.Get("__EVENTTARGET").ToString() == dateTimeFilter.ClientID)
{
dateTimeFilter_SelectedIndexChanged(dateTimeFilter, null);
}
}
}
But I'm sill confused why you can't just use standard OnSelectedIndexChanged or OnSelectedValueChanged?
I am trying to build a site with a "Next" button to display next question on the same page without reloading the page or redirecting to another page but I can't figure out how!
You could use an UpdatePanel and a Scriptmanager.
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<fieldset>
<asp:Label ID="Label1" runat="server" Text="Question 1"></asp:Label>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</fieldset>
</ContentTemplate>
</asp:UpdatePanel>
And in code behind just do what you always do
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Question 2";
}
You will find that the text of the label changes when the button is clicked without a page refresh.
On click on button function are not getting fired. Why this is happening.
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdateProgress ID="UpdateProgress1" runat="server"
AssociatedUpdatePanelID="UpdatePanel1">
<ProgressTemplate>
<asp:Image ID="Image1" runat="server"
ImageUrl="~/images/ajax-progress.gif"
/>
<br />
Please Wait. This will take few minutes.
</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="btnUpdate" runat="server"
Text="Update"
onclick="btnUpdate_Click"
Width="100px" />
</ContentTemplate>
</asp:UpdatePanel>
code behind :
protected void btnUpdate_Click(object sender, EventArgs e)
{
trunc();
ConsumerUpld(FileUpload1);
}
ConsumerUpld(fileupld) function updates table in database
Everything seam fine, so I tested your code by replacing it by a btnUpdate.Text = "updated";
protected void btnUpdate_Click(object sender, EventArgs e)
{
btnUpdate.Text = "updated";
//trunc();
//ConsumerUpld(FileUpload1);
}
Everything run smoothly, so your problems is within one of the 2 functions you call.
When an error occurs during an async postback, it show on the button of the browser page (the way it show depend of your browser). You should try to debug it with breakpoints or comment out the update panel to see what is happening.
i have a label and button inside update panel, when i try to get the value from the label on the button click, i get the value from label, but when i try to set the value to the label, it does not happens, i checked for JavaScript error, but there wasn't any, does anyone have any guess what could be the reason. i am using dotnetnuke and here is my code
<asp:UpdatePanel ID="updSection6" runat="server"><ContentTemplate>
<asp:Label ID="lbl" runat="server" />
<asp:ImageButton ImageUrl="/images/edit.gif" ID="btnEditSectionStory6" runat="server" OnClick="Clicked" />
</ContentTemplate></asp:UpdatePanel>
and here's the code
protected void Clicked(object sender, EventArgs e)
{
lbl.Text="Welcome";
}
You need to add the following code
<Triggers>
<asp:PostBackTrigger ControlID="btnEditSectionStory6" />
</Triggers>
Just before your closing </asp:UpdatePanel>
So your code should look like:
<asp:UpdatePanel ID="updSection6" runat="server">
<ContentTemplate>
<asp:Label ID="lbl" runat="server" />
<asp:ImageButton ImageUrl="/images/edit.gif" ID="btnEditSectionStory6" runat="server" OnClick="Clicked" />
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="btnEditSectionStory6" />
</Triggers>
</asp:UpdatePanel>
ASP PostBackTrigger
Specifies a control and event that will cause a full page update (a
full page refresh). This tag can be used to force a full refresh when
a control would otherwise trigger partial rendering.
You can read more about UpdatePanel's and Triggers here.
C# (using the ImageClickEventArgs)
protected void Clicked(object sender, ImageClickEventArgs e)
{
lbl.Text = "Welcome";
}
I have an update panel with some textboxes and a button inside. When nothing is preloded into the textbox and I enter the data and click on the button the update panel works fine, but when data is preloaded onto the textbox onload, the update panel would not update my data and the server does not grab the data that was entered onto the textbox. Below is a sample code. Please help.
<asp:UpdatePanel runat="server" id="UpdatePanel1" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox runat="server" Columns="30" MaxLength="50" ID="tbxPhone" onblur="PhoneBlur(this)"></asp:TextBox>
<asp:Button ID="findOrderBtn" runat="server" OnClientClick="test()" OnClick="btnSearch_Click" Text="Search..." />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="findOrderBtn" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
Below is an example of the code behind:
protected void btnSearch_Click(object sender, EventArgs e)
{
string phone = tbxPhone.Text;
}
So if tbxPhone Textbox is originally "555-555-5555" on page_load and I change it to "222-222-2222" and click on the Search... button, the data is returned is "555-555-5555" instead of "222-222-2222"
Here is the sample for you try this:
1.Add a script manager on your form
2.Add a update panel and do this way
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox runat="server" Text="222-222-222" ID="txtValue"></asp:TextBox>
<asp:Button ID="btnsubmit" runat="server" Text="Button" />
<asp:Label ID="lblValue" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</div>
On button_Click event:
Protected Sub btnsubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnsubmit.Click
lblValue.Text = txtValue.Text
End Sub
I have an Page_Load that calls a function to pre-load data into my textbox. Once I hit the search button to update my panel, I realized that it goes through the Page_Load again hence why the data I've entered into the textbox was over written with original pre-loaded data.
Added the !IsPostBack to my Page_Load and fixed my problem.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// Code Here
}
}