I am using a DropDownList in an UpdatePanel. It fills when the user writes some text in the TextBox and click the "Go" Button.
xaml is as follow :
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="ODSearchTB" runat="server" ClientIDMode="Static"></asp:TextBox>
<asp:Button ID="ODFindButton"
class="btn btn-default goButton"
runat="server" Text="Go"
ClientIDMode="Static"
UseSubmitBehavior="False"
CausesValidation="False"
OnClick="ODFindButton_Click" /><br/>
<asp:DropDownList ID="ODSearchDDL" runat="server" Visible="False" AutoPostBack="True"></asp:DropDownList>
</ContentTemplate>
</asp:UpdatePanel>
and the code behind that fills the DropDownList on click :
protected void ODFindButton_Click(object sender, EventArgs e)
{
var res = ServiceUnitOfWork.MedicalOffices.FindMedicalOfficesByName(
ODSearchTB.Text,
doctor: false,
hospital: true,
service: false,
establishment: true);
List<LightMedicalOffice> source = getLightMedicalOffices(res.ToList());
ODSearchDDL.DataSource = source;
ODSearchDDL.DataTextField = "Name";
ODSearchDDL.DataValueField = "IdAddress";
ODSearchDDL.DataBind();
ODSearchDDL.Visible = true;
}
This works fine, the datasource will update properly and the DropDownList will be filled and updated (in the UpdatePanel) without the page reloading. The problem occurs when the form is submitted : the DropDownList is empty (datasource null) in the Page_Load event so when I reach the Submit_Click and the CustomValidator_ServerValidate events, I can't know what was the selected value of the list.
The ViewState seems to be enabled on both the page and the control. I have no clue to what could cause such a behavior.
Do you reset the DropDown in the Page_Load event? I implemented your code above, and added a submit button outside of the update panel. I was able to capture the value of the DropDown control within my OnClick event of the submit button.
Related
I have a LinkButton in an InsertItemTemplate which when clicked, should display a hidden DropDownList in the InsertItemTemplate. However, it doesn't seem to be working, but it will say, change the text of a label outside the Formview when the LinkButton is clicked. The event is firing, but the part to make the DropDownList visible in the InsertItemTemplate is not doing anything. Code is below:
.aspx:
<asp:FormView ID="formViewNewRecord" runat="server">
<InsertItemTemplate>
<asp:DropDownList ID="ddlAddSelection2" runat="server" DataSourceID="dSource1" DataTextField="Users" DataValueField="Users" AppendDataBoundItems="true" Visible="false">
<asp:ListItem></asp:ListItem>
</asp:DropDownList>
<asp:LinkButton runat="server" ID="lbAddAnother" OnClick="lbAddAnother_Click">+Add Another</asp:LinkButton>
</InsertItemTemplate>
</asp:FormView>
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
C#:
protected void lbAddAnother_Click(object sender, EventArgs e)
{
DropDownList addSelection2 = (DropDownList)formViewNewItem.Row.Cells[0].FindControl("ddlAddSelection2");
addSelection2.Visible = true;
Label2.Text = addSelection2.ID;
}
Your dropdown control is not an immediate child of your formview. So since the FindControl call is not recursive, you have to search for the control in the right location of your form view's child controls. See this for the details but at a high level, you need something along the lines of:
DropDownList ctrl = (DropDownList)FormView1.Row.Cells[0].FindControl("ddlAddSelection2");
After that, you should check it for null for safe measure.
currently I have a UpdatePanel for jQuery Dialog use, which contains a GridView.
And that GridView contains a FileUpload control in footer and EmptyDataTemplate
In order to get FileUpload control work in javascript, I know that we need trigger.
However, the button that I wanna assign as trigger is inside GridView's template...
when the button btnAdd clicked, file in FileUpload control will be saved.
Here is the code:
<asp:UpdatePanel ID="upnlEditExpense" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnAdd"/>
</Triggers>
......................
........................
.........................
<asp:GridView runat="server" ID="grdExpense" ShowHeader="True" ShowFooter="True"
AutoGenerateColumns="False">
<Columns>
...................
<asp:TemplateField>
<FooterTemplate>
<asp:LinkButton runat="server" ID="btnAdd" Text="Add" OnClick="btnAdd_Click"></asp:LinkButton>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</asp:UpdatePanel>
If I put the button id directly in trigger's control ID like this, error come up saying btnAdd could not be found...
what should I do to get FileUpload control work?
This works
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);
}
}
Try registering the post back control from code behind like this:
protected void grdExpense_RowCreated(object sender, GridViewRowEventArgs e)
{
LinkButton btnAdd = (LinkButton)e.Row.Cells[0].FindControl("btnAdd");
if (btnAdd != null)
{
ScriptManager1.RegisterAsyncPostBackControl(btnAdd);
}
}
Instead of adding a trigger to upnlEditExpense maybe you can try to add an update panel around the link button inside the template with no triggers...
<asp:TemplateField>
<FooterTemplate>
<asp:UpdatePanel ID="upnlBtnAdd" runat="server">
<ContentTemplate>
<asp:LinkButton runat="server" ID="btnAdd" Text="Add" OnClick="btnAdd_Click"></asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
</FooterTemplate>
</asp:TemplateField>
I had a similar problem and this post helped me, but I found that registering the control in the scriptmanager works only if the updatepanels UpdateMode is set to "Always". If its set to "Conditional" this approach does not work.
I found another approach that always works which is to add triggers to the updatepanel in the DataBound() event of the gridview:
Dim CheckBoxTrigger As UpdatePanelControlTrigger = New AsyncPostBackTrigger()
Dim SelectCheckBox As CheckBox
For i = 0 To GridViewEquipment.Rows.Count - 1 Step 1
SelectCheckBox = GridViewEquipment.Rows(i).Cells(12).FindControl("CheckBoxSign")
CheckBoxTrigger.ControlID = SelectCheckBox.UniqueID
UpdatePanelEquipment.Triggers.Add(CheckBoxTrigger)
Next
I have a gridview where I have button for each row. After clicking this button, the Modal PopUp Extender Panel is opened (with PanelName.Show()). The Panel contains a user control, which shows some labels, textboxes,etc. with an additional info binded form SqlDataSource. Until this point it works well. But, when I click another button, the panel is purely shown but the content is not refreshed (based on which button is clicked, some details info should be shown). Basically, the method SqlDataSource_Selecting is called only for the panel popup showing but not anymore.
How can I force panel to be refreshed (reloaded) after each PanelName.Show()??
Thanks in advance.
If I'm understanding your question correctly, I think the problem is that you just need to re-Bind your data bound controls after the user clicks the button to change the Selected item. You can use [ControlName].DataBind() to do that. Does that make sense?
It depends on whether the control(s) you want to refresh are DataBound() or not.
In other words, can you force the control to reload by using a DataBind() method call to force the control to reload itself, with either the same or new data?
Most GUI controls have the DataBind() method, but it's useless if the control is not actually using data to work!
This is why in your case your panel is not "refreshed" with new data because using a DataBind() on the panel does nothing. Using a databind() on the entire GridView is a different story and should work. Maybe place an UPDATEPANEL around the whole lot? If you do you have to be careful your normal edits and other Commands on the rows will continue to work.
However, What you can do is place the modalpopupextender inside your TemplateField, and using a "trick", you can keep your server post backs and still fire the popup panel.
ie
<asp:UpdatePanel ID="upADDMAIN" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button ID="btnADD" runat="server" Text="NEW LOGIN" BackColor="Blue" Font-Bold="True" ForeColor="#FFFFCC" OnClick="btnADD_Click" />
<asp:Button ID="btnDUM" runat="server" style="display:none" />
<div style="height:20px">
</div>
<ajaxToolkit:ModalPopupExtender ID="mpeADD" runat="server"
targetcontrolid="btnDUM"
popupcontrolid="upADD"
backgroundcssclass="modelbackground">
</ajaxToolkit:ModalPopupExtender>
<asp:UpdatePanel ID="upAdd" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="pnlADD" runat="server" Width="700px" HorizontalAlign="Center" CssClass="auto-style10" Height="200px">
..
..
<div id="puFTR" class="auto-style17" style="vertical-align: middle">
<asp:Button id="btnOK" runat="server" Text="OK" style="width: 80px" OnClick="btnOK_Click" />
<asp:Button id="btnCAN" runat="server" Text="CANCEL" style="width: 80px" OnClick="btnCAN_Click" CausesValidation="False" />
</div>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</ContentTemplate>
</asp:UpdatePanel>
As you may see, the btnDUM control is a Dummy to get the MPE to work, but it's not actually used as it's hidden by the style="display:none" tag.
However, the btnADD does work because it calls a Click() method on the server side which does the refresh of data on your new row. You may have to use a little jScript to pass the ROWINDEX into the Click() method for it to work with a GridView.
Incidentally, the Click() method in my case "controls" the MPE manually...
protected void btnADD_Click(object sender, EventArgs e)
{
ClearADDform();
mpeADD.Show();
}
protected void ClearADDform()
{
txtLOGIN.Text = string.Empty;
cbISActive.Checked = true;
txtPWD.Text = string.Empty;
ddlAgent.SelectedIndex = -1;
}
In my case, the above code example is outside a GridView, so you'll need to adjust.
But the point is, you can still have Server Side calls using Ajax popups!
Good luck.
I am having an issue when a page contains multiple ModalPopups each containing a ValidationSummary Control.
Here is the functionality I need:
A user clicks a button and a Modal Popup appears with dynamic content based on the button that was clicked. (This functionality is working. Buttons are wrapped in UpdatePanels and the partial page postback calls .Show() on the ModalPopup)
"Save" button in ModalPopup causes client side validation, then causes a full page postback so the entire ModalPopup disappears. (ModalPopup could disappear another way - the ModalPopup just needs to disappear after a successful save operation)
If errors occur in the codebehind during Save operation, messages are added to the ValidationSummary (contained within the ModalPopup) and the ModalPopup is displayed again.
When the ValidationSummary's are added to the PopupPanel's, the ModalPopups no longer display correctly after a full page postback caused by the "Save" button within the second PopupPanel. (the first panel continues to function correctly) Both PopupPanels are displayed, and neither is "Popped-Up", they are displayed in-line.
Any ideas on how to solve this?
EDIT: Functionality in each Popup is different - that is why there must be two different ModalPopups.
EDIT 2: Javascript error I was receiving:
function () {
Array.remove(Page_ValidationSummaries, document.getElementById(VALIDATION_SUMMARY_ID));
}
(function () {
var fn = function () {
AjaxControlToolkit.ModalPopupBehavior.invokeViaServer("MODAL_POPUP_ID", true);
Sys.Application.remove_load(fn);
};
Sys.Application.add_load(fn);
}) is not a function
Missing ";" in injected javascript. see answer below
Image of Error State (after "PostBack Popup2" button has been clicked)
ASPX markup
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<%--*********************************************************************
Popup1
*********************************************************************--%>
<asp:UpdatePanel ID="Popup1ShowButtonUpdatePanel" runat="server">
<ContentTemplate>
<%--This button will cause a partial page postback and pass a parameter to the Popup1ModalPopup in code behind
and call its .Show() method to make it visible--%>
<asp:Button ID="Popup1ShowButton" runat="server" Text="Show Popup1" OnClick="Popup1ShowButton_Click"
CommandArgument="1" />
</ContentTemplate>
</asp:UpdatePanel>
<%--Hidden Control is used as ModalPopup's TargetControlID .Usually this is the ID of control that causes the Popup,
but we want to control the modal popup from code behind --%>
<asp:HiddenField ID="Popup1ModalPopupTargetControl" runat="server" />
<ajax:ModalPopupExtender ID="Popup1ModalPopup" runat="server" TargetControlID="Popup1ModalPopupTargetControl"
PopupControlID="Popup1PopupControl" CancelControlID="Popup1CancelButton">
</ajax:ModalPopupExtender>
<asp:Panel ID="Popup1PopupControl" runat="server" CssClass="ModalPopup" Style="width: 600px;
background-color: #FFFFFF; border: solid 1px #000000;">
<%--This button causes validation and a full-page post back. Full page postback will causes the ModalPopup to be Hid.
If there are errors in code behind, the code behind will add a message to the ValidationSummary,
and make the ModalPopup visible again--%>
<asp:Button ID="Popup1PostBackButton" runat="server" Text="PostBack Popup1" OnClick="Popup1PostBackButton_Click" />
<asp:Button ID="Popup1CancelButton" runat="server" Text="Cancel Popup1" />
<asp:UpdatePanel ID="Popup1UpdatePanel" runat="server">
<ContentTemplate>
<%--*************ISSUE HERE***************
The two ValidationSummary's are causing an issue. When the second ModalPopup's PostBack button is clicked,
Both ModalPopup's become visible, but neither are "Popped-Up".
If ValidationSummary's are removed, both ModalPopups Function Correctly--%>
<asp:ValidationSummary ID="Popup1ValidationSummary" runat="server" />
<%--Will display dynamically passed paramter during partial page post-back--%>
Popup1 Parameter:<asp:Literal ID="Popup1Parameter" runat="server"></asp:Literal><br />
</ContentTemplate>
</asp:UpdatePanel>
<br />
<br />
<br />
</asp:Panel>
<br />
<br />
<br />
<%--*********************************************************************
Popup2
*********************************************************************--%>
<asp:UpdatePanel ID="Popup2ShowButtonUpdatePanel" runat="server">
<ContentTemplate>
<%--This button will cause a partial page postback and pass a parameter to the Popup2ModalPopup in code behind
and call its .Show() method to make it visible--%>
<asp:Button ID="Popup2ShowButton" runat="server" Text="Show Popup2" OnClick="Popup2ShowButton_Click"
CommandArgument="2" />
</ContentTemplate>
</asp:UpdatePanel>
<%--Hidden Control is used as ModalPopup's TargetControlID .Usually this is the ID of control that causes the Popup,
but we want to control the modal popup from code behind --%>
<asp:HiddenField ID="Popup2ModalPopupTargetControl" runat="server" />
<ajax:ModalPopupExtender ID="Popup2ModalPopup" runat="server" TargetControlID="Popup2ModalPopupTargetControl"
PopupControlID="Popup2PopupControl" CancelControlID="Popup2CancelButton">
</ajax:ModalPopupExtender>
<asp:Panel ID="Popup2PopupControl" runat="server" CssClass="ModalPopup" Style="width: 600px;
background-color: #FFFFFF; border: solid 1px #000000;">
<%--This button causes validation and a full-page post back. Full page postback will causes the ModalPopup to be Hid.
If there are errors in code behind, the code behind will add a message to the ValidationSummary,
and make the ModalPopup visible again--%>
<asp:Button ID="Popup2PostBackButton" runat="server" Text="PostBack Popup2" OnClick="Popup2PostBackButton_Click" />
<asp:Button ID="Popup2CancelButton" runat="server" Text="Cancel Popup2" />
<asp:UpdatePanel ID="Popup2UpdatePanel" runat="server">
<ContentTemplate>
<%--*************ISSUE HERE***************
The two ValidationSummary's are causing an issue. When the second ModalPopup's PostBack button is clicked,
Both ModalPopup's become visible, but neither are "Popped-Up".
If ValidationSummary's are removed, both ModalPopups Function Correctly--%>
<asp:ValidationSummary ID="Popup2ValidationSummary" runat="server" />
<%--Will display dynamically passed paramter during partial page post-back--%>
Popup2 Parameter:<asp:Literal ID="Popup2Parameter" runat="server"></asp:Literal><br />
</ContentTemplate>
</asp:UpdatePanel>
<br />
<br />
<br />
</asp:Panel>
Code Behind
protected void Popup1ShowButton_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
//Dynamically pass parameter to ModalPopup during partial page postback
Popup1Parameter.Text = btn.CommandArgument;
Popup1ModalPopup.Show();
}
protected void Popup1PostBackButton_Click(object sender, EventArgs e)
{
//if there is an error, add a message to the validation summary and
//show the ModalPopup again
//TODO: add message to validation summary
//show ModalPopup after page refresh (request/response)
Popup1ModalPopup.Show();
}
protected void Popup2ShowButton_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
//Dynamically pass parameter to ModalPopup during partial page postback
Popup2Parameter.Text = btn.CommandArgument;
Popup2ModalPopup.Show();
}
protected void Popup2PostBackButton_Click(object sender, EventArgs e)
{
//***********After This is when the issue appears**********************
//if there is an error, add a message to the validation summary and
//show the ModalPopup again
//TODO: add message to validation summary
//show ModalPopup after page refresh (request/response)
Popup2ModalPopup.Show();
}
This is an issue with using both ValidationSummary and ModalPopup.
see here: http://ajaxcontroltoolkit.codeplex.com/WorkItem/View.aspx?WorkItemId=12835
The problem is that there is a missing ";" between the two injected scripts.
Their solution is to create/use a custom server control that inherits from ValidationSummary, that injects a ";" into the page startup script to fix the bug:
[ToolboxData("")]
public class AjaxValidationSummary : ValidationSummary
{
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), this.ClientID, ";", true);
}
}
Put all the <asp:ValidationSummary controls at the end of the document.
Error will be resolved.
Did you seto a different "ValidationGroup" of each popup (ValidationSummary + validators) ?
it seems there is bug in modal pop extender with validation summary in panel. to avoid the scenario always put the validation summary modal popup extender and panel at the bottom of code.
add the respective code at bottom of page
<%--This button causes validation and a full-page post back. Full page postback will causes the ModalPopup to be Hid.
If there are errors in code behind, the code behind will add a message to the ValidationSummary,
and make the ModalPopup visible again--%>
<%--*************ISSUE HERE***************
The two ValidationSummary's are causing an issue. When the second ModalPopup's PostBack button is clicked,
Both ModalPopup's become visible, but neither are "Popped-Up".
If ValidationSummary's are removed, both ModalPopups Function Correctly--%>
<%--Will display dynamically passed paramter during partial page post-back--%>
Popup1 Parameter:
I have a gridview that is only shown in a modal popup. right before I call the modal popup I set a value in a textbox. The gridview inside the modal popup depends on that textbox's value for it's data to show up at all. SO onclick I want to reload the gridview so that it will reload with the textbox's value. Any ideas?
Essentially... Using update panel, the button press event should trigger the partial postback where your query is rerun that would then allow you to do another databind on your grid. THis would all be followed by a modalPopUp.Show()...
CODE BEHIND
protected void btnAdd_Click(object sender, EventArgs e)
{
if(!String.IsNullOrEmpty(this.txtMyValue.Text))
{
AddValue(this.txtMyValue.Text);
UpdateGrid();
this.UpdatePanel1.Update();
}
else
{
//ooooops
}
}
private void AddValue(String str)
{
DataAccess.AddSomeValue(str);
}
private void UpdateGrid()
{
this.GridView1.DataSource = DataAccess.GetData();
this.GridView1.DataBind();
}
FRONT END
<asp:UpdatePanel ID="UpdatePanel1" runat="server" updatemode="Conditional">
<ContentTemplate>
<asp:TextBox id="TextBox1" runat="server" />
<asp:Button id="btnAdd" OnClick="btnAdd_Click" runat="Server">
<div id="MyModalArea">
<asp:GridView id="GridView1" runat="Server" ..... >
</asp:GridView>
</div>
</ContentTemplate>
</asp:UpdatePanel>
Put popup window content (grid and the rest there is) in separate aspx page and then when you initialize popup window, send textbox value as parameter:
MyPopupWindowContent.aspx?TextBoxValue=something