I use two UpdatePanel tags, one has a Svg inside and I need to refresh its content when a button is clicked, and the button is inside another UpdatePanel. And I just realize my Page_Load function in codebehind gets executed everytime I click the button. I set the property UpdateMode="Conditional" already but not helping. Any idea why? Following is my code:
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel runat="server" id="GlobalUpdatePanel" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger controlid="ButtonPP" eventname="Click" />
</Triggers>
<ContentTemplate>
<svg width ="1024" height = "540"></svg>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="ControlUpdatePanel" runat="server" Visible="True" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button id ="ButtonPP" runat="server" Text="Run PP" OnClick="ButtonPP_Click" />
</ContentTemplate>
</asp:UpdatePanel>
Thanks in advance!
Since the Page_Load function in code behind gets executed everytime the button is clicked, I'd guess you need to add if (!IsPostBack) in there, something like this:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// code that's only executed at first load
}
}
Related
I have one master page and one web form selected with that master page.
In this web form I take two text boxes and one label.
Code I wrote in C# file [aspx.cs] as follows :
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
Label1.Text = "Welcome " + TextBox1.Text;
}
I don't want to keep AutoPostBack propery because when I press tab button then its value fires and appears to the label so that I don't want AutoPostBack property.
From internet i see the code for updatepanel and scriptmanager.
In updatepanel i write trigger tag but also it is not working.
my ASPX file :
<asp:ScriptManager ID="ScriptManager1" EnablePartialRendering="true" runat="server">
</asp:ScriptManager>
<asp:TextBox ID="TextBox1" runat="server" ontextchanged="TextBox1_TextChanged"></asp:TextBox>
<asp:TextBox ID="TextBox2" runat="server" ontextchanged="TextBox2_TextChanged"></asp:TextBox>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="TextBox1" EventName ="TextChanged" />
</Triggers>
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
so how to fire TextChanged event.
Im using ASP.NET LinkButton.
I have a LinkButton which calls code behind from onclick:
on aspx:
<asp:LinkButton ID="LinkTest" runat="server" onclick="LinkTest_Click" OnClientClick="return false;" >LinkButton</asp:LinkButton>
on aspx.cs:
protected void LinkTest_Click(object sender, EventArgs e)
{
//code here
}
As you can see I have set OnClientClick="return false;" so that it wont do a postback.
The postback does not happens. But the code behind is not fired.
I want the code behind to fire and I want no postback when the linkbutton is clicked.
How can I do this?
Thanks.
Remove the OnclientClick attribute of the linkbutton. Try using an UpdatePanel like:
<asp:UpdatePanel ID="up1" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="LinkTest" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:label id="Label1" runat="server" Text="Initial Label" />
</ContentTemplate>
</asp:UpdatePanel>
Also, you will need to add a ScriptManager in your page.
Add the linkbutton inside updatepanel,
remove onclientclick attribute of the linkbutton:
Page:
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="lblName" runat="server" Text="Old Value"></asp:Label>
<br />
<asp:LinkButton ID="lnkbtChange" runat="server" OnClick="lnkbtChange_Click">Change</asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
CodeBehind:
protected void lnkbtChange_Click(object sender, EventArgs e)
{
lblName.Text = "New value";
}
I've got a webform with two update panels:
<asp:ScriptManager ID="ScriptManager1" runat="server" ScriptMode="Release">
</asp:ScriptManager>
<p>
<asp:UpdatePanel ID="upl1" runat="server">
<ContentTemplate>
<asp:Button runat="server" ID="btn1" Text="Button1" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="upl2" runat="server">
<ContentTemplate>
<asp:Button runat="server" id="btn2" Text="Button2" />
</ContentTemplate>
</asp:UpdatePanel>
</p>
If I click btn1, then the load event of upl2 is triggered, as well as upl1.
I would expect only upl1 to be loaded, since this is the update panel that contains the button.
Why isn't this happening, and how can I make it happen?
One pratice I always use when I work with Update Panels, is to set the properties: ChildrenAsTriggers="false" UpdateMode="Conditional"
And refresh the Update Panel only when I want:
protected void btn1_Click(object sender, EventArgs e)
{
// some logic
// ....
upl1.Update();
}
Try applying these properties and see if it solves your problem.
I had a similar problem with a button triggering an UpdatePanel, and using ChildrenAsTriggers="false" UpdateMode="Conditional" didn't help.
I ended up using the following to force the button to do a regular post-back:
ScriptManager1.RegisterPostBackControl(btn1);
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
}
}