Develop Reference

Ajax ModalPopUp Window according to certain conditions

I have a Ajax ModalPopupExtender in my page.On a button click currently using TargetControlId i am showing the pop up.My need is when i am clicking the button want to check some conditions from DB.If condition satisfies i want to show the pop up.Other wise no need of pop up.How can i do this?
<ajaxToolkit:ModalPopupExtender CancelControlID="btnCancel" BackgroundCssClass="modalBackground" runat="server" ID="PopupExtender" TargetControlID="btn" PopupControlID="Panel1"></ajaxToolkit:ModalPopupExtender>

protected void ButtonSave_Click(object sender, EventArgs e)
{
if (MyCondition == true)
{
modalPopUpConfirmation.Show();
}
else
{
Label1.Text = "The condition was false, so no modal popup!";
}
}

Try like this
protected void Button1_Click(object sender, EventArgs e)
{
PopupExtender.Show();
}

Call it dynamically.
<!-- Hidden Field -->
<asp:HiddenField ID="hidForModel" runat="server" />
<ajaxToolkit:ModalPopupExtender CancelControlID="btnCancel" BackgroundCssClass="modalBackground" runat="server" ID="PopupExtender" TargetControlID="hidForModel" PopupControlID="Panel1"></ajaxToolkit:ModalPopupExtender>
<asp:Button ID="btnShowPopup" runat="server" Text="Save Data"
OnClick="btnShowPopup_Click" />
Code Behind
protected void btnShowPopup_Click(object sender, EventArgs e)
{
if(Yourcondition)
{
PopupExtender.Show();
}
}

Adding Dynamic Controls in ASP.NET

It kind of seems to me that there is an inherent difficulty in dynamically adding controls in ASP.NET Web Forms. Specifically, for a dynamically added control to be included in the ViewState, and have it's events properly wired up and so forth it is suggested that these be added during the Page_PreInit event.
That said, many times we'll probably want to add such controls according to an event, such as a user clicking a button. Control specific events like Click events always run after Init, and even after Load. Supposed the following .aspx....
<form id="form1" runat="server">
<div>
<asp:PlaceHolder ID="phAddresses" runat="server"></asp:PlaceHolder>
<br /><br />
<asp:Button ID="btnAddAddress" runat="server" Text="Add Another Address" OnClick="btnAddAddress_Click" />
...and the following .aspx.cs....
private static List<AddressUserControl> addresses = new List<AddressUserControl>();
protected void Page_PreInit(object sender, EventArgs e)
{
foreach (AddressUserControl aCntrl in addresses)
{
phAddresses.Controls.Add(aCntrl);
// Helper to find button within user control
addressButtonControl = findAddressControlRemoveButton(aCntrl);
addressUserControlButton.ID = "btnRemoveAddress" + addressCount;
addressUserControlButton.Click += new EventHandler(addressUserControlButton_Click);
addressCount++;
}
}
protected void btnAddAddress_Click(object sender, EventArgs e)
{
AddressUserControl aCntrl = LoadControl("~/UserControls/AddressUserControl.ascx") as AddressUserControl;
addresses.Add(aCntrl);
}
Now in the above situation the number of User Controls displayed is always one behind the number the user has actually added, because the Click event doesn't run until after PreInit, where controls must be added to the placeholder. I must be missing something here, because this seems inherent to the ASP lifecycle, and to require some 'hack' or other.
EDIT - Yeah for some reason EventHandlers I add during btnAddress_Click() won't run, only EventHandlers I add during Page_Init, or declaratively in markup. This is what I tried to do...
protected void btnAddAddress_Click(object sender, EventArgs e)
{
AddressUserControl aCntrl = LoadControl("~/UserControls/AddressUserControl.ascx") as AddressUserControl;
addresses.Add(aCntrl);
phAddresses.Controls.Add(aCntrl);
findAddressControlRemoveButton(aCntrl);
addressUserControlButton.ID = "btnRemoveAddress" + addresses.Count;
///////////////////////////////////////////////////////////////////////////////////
// ADDED EVENT HANDLER HERE
//////////////////////////////////////////////////////////////////////////////////////
addressUserControlButton.Click += new E ventHandler(addressUserControlButton_Click);
}
...but the event won't fire as I've said. Any ideas?
EDIT - Here's the markup for my AddressUserControl. There's no logic in the code behind file
<%# Control Language="C#" ClassName="AddressUserControl" AutoEventWireup="true" CodeBehind="AddressUserControl.ascx.cs" Inherits="XFAWithUserControl.UserControls.AddressUserControl" %>
<asp:Panel ID="pnlAddressForm" runat="server">
<asp:Label ID="lblStreet" runat="server" Text="Street Address"></asp:Label>
<asp:TextBox ID="txtStreet" runat="server"></asp:TextBox>
<br /><br />
<asp:Label ID="lblCity" runat="server" Text="City"></asp:Label>
<asp:TextBox ID="txtCity" runat="server"></asp:TextBox>
<br /><br />
<asp:Label ID="lblState" runat="server" Text="State"></asp:Label>
<asp:TextBox ID="txtState" runat="server"></asp:TextBox>
<br /><br />
<asp:Label ID="lblZip" runat="server" Text="Zip"></asp:Label>
<asp:TextBox ID="txtZip" runat="server"></asp:TextBox>
<br /><br />
<asp:Button ID="btnRemoveAddress" runat="server" Text="Remove Address" />
</asp:Panel>
right now my click event for btnRemoveAddress is just something silly like this...
private void addressUserControlButton_Click(object sender, EventArgs e)
{
Button thisButton = sender as Button;
thisButton.Text = "Why Hello";
}
but my goal is to have it remove the associated AddressUserControl, so that a user can add and/or remove an arbitrary number of AddressUserControls from the page by clicking buttons.
EDIT - Here's what I have now, still doesn't work
protected void btnAddAddress_Click(object sender, EventArgs e)
{
AddressUserControl aCntrl = LoadControl("~/UserControls/AddressUserControl.ascx") as AddressUserControl;
addresses.Add(aCntrl);
phAddresses.Controls.Add(aCntrl);
findAddressControlRemoveButton(aCntrl);
addressUserControlButton.ID = "btnRemoveAddress" + addresses.Count;
aCntrl.ChangeText += new EventHandler(addressUserControlButton_Click);
}
private void addressUserControlButton_Click(object sender, EventArgs e)
{
Button thisButton = sender as Button;
thisButton.Text = "Why Hello";
}
AddressUserControl.ascx
<asp:Panel ID="pnlAddressForm" runat="server">
<asp:Label ID="lblStreet" runat="server" Text="Street Address"></asp:Label>
<asp:TextBox ID="txtStreet" runat="server"></asp:TextBox>
<br /><br />
<asp:Label ID="lblCity" runat="server" Text="City"></asp:Label>
<asp:TextBox ID="txtCity" runat="server"></asp:TextBox>
<br /><br />
<asp:Label ID="lblState" runat="server" Text="State"></asp:Label>
<asp:TextBox ID="txtState" runat="server"></asp:TextBox>
<br /><br />
<asp:Label ID="lblZip" runat="server" Text="Zip"></asp:Label>
<asp:TextBox ID="txtZip" runat="server"></asp:TextBox>
<br /><br />
<asp:Button ID="btnRemoveAddress" runat="server" Text="Remove Address" OnClick="btnRemoveAddress_Click" />
</asp:Panel>
AddressUserControl.ascx.cs
public event EventHandler ChangeText;
protected void Page_Load(object sender, EventArgs e)
{
}
public void btnRemoveAddress_Click(object sender, EventArgs e)
{
if (this.ChangeText != null)
{
ChangeText(sender, e);
}
}

You need to have the logic in your click handler add to the panel's Controls collection as well as to the list of controls, like this:
protected void btnAddAddress_Click(object sender, EventArgs e)
{
AddressUserControl aCntrl = LoadControl("~/UserControls/AddressUserControl.ascx") as AddressUserControl;
addresses.Add(aCntrl);
phAddresses.Controls.Add(aCntrl);
}
UPDATE:
In your user control, you need to define an event that can be defined in the page that hosts the user control, like this:
AddressUserControl.cs (code-behind):
public event EventHandler RemoveAddress;
protected void removeAddressUserControlButton_Click(object sender, EventArgs e)
{
// Find out if the event has been set, if so then call it
if (this.RemoveAddress!= null)
{
RemoveAddress(sender, e);
}
}
Now on your page where you are using the user control, do this:
// Wire up the user control's event
nameOfUserControl.RemoveAddress += new EventHandler(addressUserControlButton_Click);
Finally, implement the addressUserControlButton_Click event:
protected void addressUserControlButton_Click(object sender, EventArgs e)
{
// Do your dynamic control creation here or whatever else you want on the page
}

ModalPopupExtender ASP MessageBox not closing

I wanted a popup messagebox that would show something like "Done!" when the row in my gridview is successfully removed and something else if there is an error. I used ModalPopupExtender. The modal popup shows fine but it just keeps on the page even if I click the OK button. Here is my code:
ASP:
<!--ModalPopup for "Done" message-->
<asp:ModalPopupExtender ID="ModalPopupExtDone" runat="server" PopupControlID="donePanel" TargetControlID="donePanel" CancelControlID="donePanelBtn">
</asp:ModalPopupExtender>
<div class="panel">
<asp:Panel ID="donePanel" runat="server" Width="200px" Height="41px"
BackColor="#FF9900">
<asp:Label ID="donePanelLabel" runat="server" ForeColor="#FF3300"></asp:Label>
<br />
<asp:Button ID="donePanelBtn" runat="server" Text="OK"
onclick="donePanelBtn_Click" />
</asp:Panel>
</div>
Code Behind:
protected void GridViewDept_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//some other code
if (delSuccess)
{
donePanelLabel.Text = "Record deleted!";
ModalPopupExtDone.Show();
this.RefreshGridView();
}
else
{
donePanelLabel.Text = "Record not deleted! Please try again!";
ModalPopupExtDone.Show();
}
}
What am I doing wrong?

Hide and Show Label and Button

I have 2 labels and 2 text boxes and 1 buttons displayed.
When the page loads the Name and Button (will be initially displayed). Later when i click on the Button i need to display the age label and textbox. How can i do this ?
<ol>
<li>
<asp:Label runat="server" AssociatedControlID="Name">
User name
</asp:Label>
<asp:TextBox runat="server" ID="Name" Width="167px" />
<asp:Button ID="Button1" runat="server" Text="Button" />
</li>
<li>
<asp:Label runat="server" AssociatedControlID="age">age</asp:Label>
<asp:TextBox runat="server" ID="age" TextMode="age" Width="240px" />
</li>
</ol>
code for button press
protected void Button1_Click(object sender, EventArgs e)
{
}

You could set the label/textbox Visible property to True in server side. Alternatively, you could use JavaScript to avoid post backs to the server.
Add OnClientClick to your button :
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="ShowLabel();"/>
and declare the JavaScript function on page:
<script type="text/javascript">
function ShowLabel() {
// Note that the client ID might be different from the server side ID
document.getElementById('lblAge').style.display = 'inherit';
}
</script>
You need to set the Label Display style to none initially.
<asp:Label ID="lblAge" style="display: none;" runat="server" AssociatedControlID="age">age</asp:Label>

Try below code:
You need to set Visible property of controls to True or False according to your requirement. By default, all controls are visible on the screen whenever they are added on the page.You need to do following thing:
You need to remove TextMode="age" as there is not any supported textmode of type age.
Need to define id of control if you want to access a control server side in code behind. So define the ID of Label that you put corresponding to Age textbox.
By Default age label and textbox will not be visible by using below code:
<asp:Label ID="lblAge" runat="server" AssociatedControlID="age" Visible="false">age</asp:Label>
<asp:TextBox runat="server" ID="age" Width="240px" Visible="false"/>
Code behind:
After button click age label and the textbox will be visible by using below code:
protected void Button1_Click(object sender, EventArgs e)
{
lblAge.Visible = true;
age.Visible = true;
}

First add id to elements and set visible false
<asp:Label runat="server" AssociatedControlID="age" Visible="false" Id="lbl1">age</asp:Label>
<asp:TextBox runat="server" ID="age" TextMode="age" Width="240px" Visible="false" />
button click event set visible true
protected void Button1_Click(object sender, EventArgs e)
{
lbl1.Visible = True;
age.Visible = True;
}

this is the basic concept of asp.net. you can use visible property of the control.
your TextMode enumeration is wrong. there is no Age enumeration for Textbox.TextMode TextMode
<li>
<asp:Label runat="server" AssociatedControlID="age" id="lblAge">age</asp:Label>
<asp:TextBox runat="server" ID="age" TextMode="age" Width="240px" />
</li>
in code behind
protected void Button1_Click(object sender, EventArgs e)
{
lblAge.Visible=true;
age.Visible=true;
}

protected void Page_Load(object sender, EventArgs e)
{
NameLabel.Visible = false;
NameBox.Visible = false;
}
protected void Button1_Click(object sender, EventArgs e)
{
NameLabel.Visible = true;
NameBox.Visible = true;
}

Running a C# and a Javascript function on an asp button control?

I can get both the Javascript and the C# function to work just fine.
However, my Javascript function runs before the C#.
How do I get it to run after the C# function??
Here is my code:
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:MultiView ID="MultiView1" runat="server" ActiveViewIndex="0">
<asp:View ID="View1" runat="server">
<div id="div2" style="height:70px; width:auto; text-align:center;">
<p><b>This is A View!!!</b></p>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</div>
<div id="div1">
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click"
OnClientClick="javascript:Highlit()" />
</div>
</asp:View>
</asp:MultiView>
<script type="text/javascript">
function Highlit()
{
$("#div2").effect("highlight", {}, 10000);
}
</script>
</ContentTemplate>
</asp:UpdatePanel>
Code behind:
namespace jQuery_Highlight.jQuery_Highlight
{
public partial class jQuery_HighlightUserControl : UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Changed";
}
}
}
Here is the code reflecting changes from the answers:
Code behind
namespace jQuery_Highlight.jQuery_Highlight
{
public partial class jQuery_HighlightUserControl : UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Changed";
ScriptManager.RegisterStartupScript(this, this.GetType(), "TEST", "Highlit();", true);
}
}
}
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:MultiView ID="MultiView1" runat="server" ActiveViewIndex="0">
<asp:View ID="View1" runat="server">
<div id="div2" style="height:70px; width:auto; text-align:center;">
<p><b>This is A View!!!</b></p>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</div>
<div id="div1">
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
</div>
</asp:View>
</asp:MultiView>
</ContentTemplate>
</asp:UpdatePanel>
<script type="text/javascript">
function Highlit() {
$("#div2").effect("highlight", { color: "#9499FC" }, 10000);
}
</script>

The only way to get the javascript to run after is to add a script reference in your Button1_Click event.
Example Code for standard postback:
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Changed";
Page.ClientScript.RegisterStartupScript(this.GetType(), "PostButton1_ClickScript", "Highlit();", true);
}
As noted by others, be sure to remove your OnClientClick event. Also, consider moving your "Highlit" script outside of the update panel.
Additionally, since you are in an update panel, you will need to use the following example code for a Partial Postback:
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Changed";
ScriptManager.RegisterStartupScript(this, this.GetType(), "PostButton1_ClickScript", "Highlit();", true);
}

You have to register a ClientScript at the end of Button1_Click event
and remove OnClientClick="javascript:Highlit()"
protected void Button1_Click(object sender, EventArgs e)
{
//Do stuff
ScriptManager.RegisterStartupScript(this, this.GetType(), "ANYNAME", "javascript:Highlit();", true);
}

Remove the OnClientClick attribute, and add the call as a startup script, so that it runs after the page has loaded:
protected void Button1_Click(object sender, EventArgs e) {
Label1.Text = "Changed";
Page.ClientScript.RegisterStartupScript(this.GetType(), "start", "Highlit();", true);
}
Side note: When you use the OnClientClick attribute, the code should not start with javascript:. That's only used when you put script in a href attribute in a link.