Forms Data Controls :: Adding Event Handlers To Formview Controls?
Dec 13, 2010
I've always understood that it was best practice to add event handlers in code in the page load event thus:
Button1.Attributes.Add("onclick", "alert('Hello');");
rather than "onclientclick=somefunction()"
My question is, how do you add event handlers to formview controls where the control(s) may only be on the edit template and not on the insert and read only templates.
Simply putting the code in the page load would produce an error.
Where should the statement be placed in such scenarios?
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Similar Messages:
Jan 24, 2010
I have a formview that use the formview iteminserted event. The information inserts into the formview fine, but all cells blank out after the insert. How can I make it so I can show all the values I have inserted show up in the formview after the inteminserted event?
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Mar 22, 2010
reading on the forums about assigning event handlers to controls that are dynamically created via code and am just not getting anywhere.In my particular case, I'm rolling through a directory of images and creating ImageButton controls on the fly and want to assign the OnCommand event to a single handler.Then, by using the CommandName (which is different for each control) I can figure out which ImageButton was clicked and act accordingly.
The snippet below (which can be found in many posts on this topic) is inside a foreach which loops through the directory and gets each FileInfo (fi).Each is then added to a PlaceHolder (phImages).
[Code]...
This code compiles and runs but the event handler is never invoked when an ImageButton is clicked. I believe this is because you cannot, without some coding I'm not familiar enough to do yet, assign a handler to multiple controls.I say this because I ran into a similar problem in a Silverlight app I wrote and had to use a lambda (=>) operator to do something similar (although I admit to not knowing enough about this to know if this situation is the same).
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Nov 24, 2010
The textbox has an onblur event (the workings of the onblur event are irrelevant), and an associated RequiredFieldValidator. This code functions exactly as it should. However,if in the body onload event I simply raise an alert of the innerHTML of tr1 or td1, the onblur event does not appear (but it does work, and can be seen when I view source in IE7). If I remove the RequiredFieldValidator, the onblur event handler is shown in the alert, or if I retain the validator but change onblur to onfocus, then the event handler also appears in the alert. I need this to work as when the user increases the Quantity, duplicates of the table row are added (I have tried both cloneNode, and setting the innerHTML of each new table cell to that of the original, but as my alert proves, the onblur event handler is not included in what is copied). The same problem also occurs with onchange for select tags with validators. I am using Visual Studio 2008 (.Net
2), IE7 and IIS 7.
[Code]....
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Jul 15, 2010
I have a situation where I dynamically load one of twenty user controls at a time in an ASP.net web page. Based on much reading I've done, I understand that I am to reload the user control upon postback via the Page_Init event handler. This I've done and it seems to work fine.
But now I would like to wire up assorted controls in the user controls such that when the value of each is changed, an event is fired and the web page is notified. Here's an example of how I'm doing that:
userControl.NewData_Handler += new EventHandler(UserControl_NewData_Handler);
There's a problem though. Because the user control is being done in Page_Init (ie. before Page_Load) I don't believe that a line of code such as the one above can function yet.
So I'm wondering what the best practice to do this is. It occurred to me that perhaps I could execute the line in the Page_Load event handler but I'm not sure if that's correct or not.
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Mar 12, 2010
I'm making an Online quiz website using ASP.NET and am using a FormView to display the questions to the user and am using Radio Buttons for the choices.
1. How to store the choices that the user selects for the questions so that I can do the scoring at the end of the test ?
2. At the Quiz page, I'd like the user to know the questions he has attempted and those that he hasn't. How shall that be done?
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Feb 15, 2010
I'd like to pull several NewValues from a FormView and write them to a database as part of the Update command.For some reason, I am unable to do this using the following code. Is there something I am missing?
[Code]....
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Nov 12, 2010
How to create event handlers for Composite Controls. I have created a composite control with label, textbox and button. Like this
[code].....
Now how to write the code once a event fires like text changed or click.
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Aug 9, 2010
Is it possible to add a date time picker to my form view? I use the form view to insert new records into a gridview connected to a Access database.
PS this is on a webpage don't know if that makes a difference
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Aug 19, 2010
How to use RadioButton in FormView in EditTemplate to get information on the field, for example:
in the template:
<Asp: FormView ID = "FormView1" runat = "server" DataSourceID = "SqlDataSource1"
Width = "907px" onitemupdating = "FormView1_ItemUpdating" DefaultMode = "Edit">
<EditItemTemplate>
<table cellpadding="4" cellspacing="4" border="0" style="width:100%;margin-top:20px">
<tr>
<td> <strong> Type Person: </ strong> </ td>
<td>
<Asp: RadioButton ID = "CHR_TIPOPESSOAFISISCARadioButton" Text = "F" runat = "server" Checked ='<%# Convert.ToBoolean (Eval ("CHR_TIPOPESSOA"). ToString (). Trim (). Equals ("F")
"true": "false")%> 'GroupName = "RadioButtonTipoPessoa" />
<Asp: RadioButton ID = "CHR_TIPOPESSOAJURIDICARadioButton" Text = "J" runat = "server" Checked ='<%# Convert.ToBoolean (Eval ("CHR_TIPOPESSOA"). ToString (). Trim (). Equals (J)
? "true": "false")%> 'GroupName = "RadioButtonTipoPessoa" />
</ Td>
</ Tr>
</ Table>
<Asp: LinkButton ID = "UpdateButton" runat = "server" CausesValidation = "True"
CommandName = "Update" Text = "Update" />
</ EditItemTemplate
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Jan 13, 2011
I've got a FormView control on a page. Its default mode is insert, since the intent is to have the user enter a record, save it, and then do something else. I've written a stored procedure to insert all of the data into 5 tables. 1 of the columns inserted is default, in SQL Server 2005, as an INT column, which is an IDENTITY column. After it inserts the record into the primary table, using a secondary stored procedure, it retrieves the newly created INT value, and then the primary stored procedure inserts records, using the new INT, into the other 4 tables. This is working fine. The primary stored procedure, which is called by the SqlDataSource on my .aspx page, defines this parameter as an output parameter:
[Code]....
In the FormView's ItemInserted event I'm trying to get the value from the FormViewInsertedEventArgs e parameter like this: [Code]....
However, the result returned is 0. Huh? That cannot be, because the new INT value created is something like 145000. Why am I then seeing a value of 0?
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Jan 27, 2010
Does anyone have an example of a formview and a gridview master detail relationship in c# ?
The gridview datasource is a datatable and the gridview is inside of the edititemtemplate of the formview.
In what event of the formview do you bind the gridview datasource?
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Dec 26, 2010
I have a user control that displays a list of records. Users have the ability to open an embedded user control with a FormView to either add a new record or to edit an existing one. The UserControl with the FormView has a button that closes and hides the user control.
If the user control with the FormView is opened to edit a record, the code works fine. But if the UserControl is opened directly into Insert mode, the code craps out
[Code]....
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Oct 6, 2010
I have a formview which in insertmode is required to assign a value to a textbox from another on textchange event. I can't get it working. here's formview code (in bold: event call:
<asp:FormView ID="fvPrecios" runat="server" AllowPaging="True" DataSourceID="OdsPrecios"
Style="position: relative" CellPadding="4" ForeColor="#333333"
DataKeyNames="precnume" >
<EditItemTemplate>
<table style="position: relative" width="400">
<tr>
<td style="width: 62px; height: 26px">
<asp:Label ID="lblEditNombre" runat="server" Text="Nombre"></asp:Label>
</td>
<td style="width: 312px; height: 26px">
<asp:TextBox ID="txtEditNombre" runat="server" Text='<%# Bind("precnomb") %>'></asp:TextBox>
</td>
<td style="width: 2256px; height: 26px">
<asp:Label ID="lblEditPlan" runat="server" Text="Plan"></asp:Label>
</td>
<td style="width: 188px; height: 26px">
<asp:ObjectDataSource ID="odsPlanItem" runat="server" SelectMethod="GetPlanes"
TypeName="Facturacion.DAL.PlanDataLayer"></asp:ObjectDataSource>
<asp:DropDownList ID="ddlPlanEdit" runat="server" DataSourceID="odsPlanItem"
DataTextField="plannomb" DataValueField="plannume"
SelectedValue='<%# Bind("plannume") %>'>
</asp:DropDownList>
</td>
</tr>
<tr>
<td style="width: 62px; height: 21px">
<asp:Label ID="lblEditBasico" runat="server" Text="Basico"></asp:Label>
</td>
<td style="width: 312px; height: 21px">
<asp:TextBox ID="txtEditBasico" runat="server" Text='<%# Bind("precbasi") %>'
ontextchanged="txtNewBasico_TextChanged"></asp:TextBox>
</td>
<td style="width: 2256px; height: 21px">
<asp:Label ID="lblEditRecargo" runat="server" Text="Recargo"></asp:Label>
</td>
<td style="width: 188px; height: 21px">
<asp:TextBox ID="txtEditRecargo" runat="server" Text='<%# Bind("precreca") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblEditTotal" runat="server" Text="Total"></asp:Label>
</td>
<td style="width: 312px">
<asp:UpdatePanel ID="UpTotal" runat="server">
<ContentTemplate>
<asp:TextBox ID="txtEditTotal" runat="server" Text='<%# Bind("prectota") %>'
ReadOnly="True"></asp:TextBox>
</ContentTemplate>
</asp:UpdatePanel>
</td>
<td style="width: 2256px">
<asp:Label ID="lblEditInicial" runat="server" Text="Inicial"></asp:Label>
</td>
<td style="width: 188px">
<asp:TextBox ID="txtEditInicial" runat="server" Text='<%# Bind("precinic") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblEditSaldo" runat="server" Text="Saldo"></asp:Label>
</td>
<td style="width: 312px">
<asp:TextBox ID="txtEditSaldo" runat="server" Text='<%# Bind("precsald") %>'></asp:TextBox>
</td>
<td style="width: 2256px">
<asp:Label ID="lblEditCuota" runat="server" Text="Cuota"></asp:Label>
</td>
<td style="width: 188px">
<asp:TextBox ID="txtEditCuota" runat="server" Text='<%# Bind("preccuot") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblEditConsignado" runat="server" Text="Consignado"></asp:Label>
</td>
<td style="width: 312px">
<asp:TextBox ID="txtEditConsignado" runat="server"
Text='<%# Bind("preccons") %>'></asp:TextBox>
</td>
<td style="width: 2256px">
<asp:Label ID="lblEditRetenido" runat="server" Text="Retenido"></asp:Label>
</td>
<td style="width: 188px">
<asp:TextBox ID="txtEditRetenido" runat="server" Text='<%# Bind("precrete") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblEditComision" runat="server" Text="Comision"></asp:Label>
</td>
<td style="width: 312px">
<asp:TextBox ID="txtEditComision" runat="server" Text='<%# Bind("preccomi") %>'></asp:TextBox>
</td>
<td style="width: 2256px">
<asp:Label ID="lblEditActivo" runat="server" Text="Activo"></asp:Label>
</td>
<td style="width: 188px">
<asp:RadioButtonList ID="rblactivo" runat="server" RepeatDirection="Horizontal"
SelectedValue='<%# Bind("precacti") %>'>
<asp:ListItem Value="S">Si</asp:ListItem>
<asp:ListItem Value="N">No</asp:ListItem>
</asp:RadioButtonList>
</td>
</tr>
<tr>
<td style="width: 62px">
</td>
<td style="width: 312px">
</td>
<td style="width: 2256px">
</td>
<td style="width: 188px">
</td>
</tr>
<tr>
<td align="center" colspan="4">
<asp:Button ID="btnInsertar" runat="server" CommandName="Update"
Text="Guardar" />
<asp:Button ID="btnCancel" runat="server" CommandName="Cancel" Text="Cancel" />
</td>
</tr>
<tr>
<td style="width: 62px">
</td>
<td style="width: 312px">
</td>
<td style="width: 2256px">
</td>
<td style="width: 188px">
</td>
</tr>
</table>
</EditItemTemplate>
<PagerTemplate>
<asp:LinkButton ID="btnFirst" runat="server" CommandName="Page" CommandArgument="First">Primera</asp:LinkButton>
<asp:LinkButton ID="btnPrev" runat="server" CommandName="Page" CommandArgument="Prev">Anterior</asp:LinkButton>
Pagina:<%#fvPrecios.PageIndex + 1%>
<asp:LinkButton ID="btnNext" runat="server" CommandName="Page" CommandArgument="Next">Siguiente</asp:LinkButton>
<asp:LinkButton ID="btnLast" runat="server" CommandName="Page" CommandArgument="Next">Ultima</asp:LinkButton>
</PagerTemplate>
<InsertItemTemplate>
<table style="position: relative" width="400">
<tr>
<td style="width: 62px; height: 26px">
<asp:Label ID="lblNewNombre" runat="server" Text="Nombre"></asp:Label>
</td>
<td style="width: 312px; height: 26px">
<asp:TextBox ID="txtNewNombre" runat="server" Text='<%# Bind("precnomb") %>'></asp:TextBox>
</td>
<td style="width: 2256px; height: 26px">
<asp:Label ID="lblNewPlan" runat="server" Text="Plan"></asp:Label>
</td>
<td style="width: 188px; height: 26px">
<asp:DropDownList ID="DdPlan" runat="server" DataSourceID="OdsPlan"
DataTextField="plannomb" DataValueField="plannume" SelectedIndex='<%# Bind("plannume") %>'
SelectedValue='<%# Bind("plannume") %>' Font-Size="Small">
</asp:DropDownList>
<asp:ObjectDataSource ID="OdsPlan" runat="server" SelectMethod="GetPlanes"
TypeName="Facturacion.DAL.PlanDataLayer" InsertMethod="Insert"
OldValuesParameterFormatString="original_{0}">
<InsertParameters>
<asp:Parameter Name="plannomb" Type="String" />
</InsertParameters>
</asp:ObjectDataSource>
</td>
</tr>
<tr>
<td style="width: 62px; height: 21px">
<asp:Label ID="lblNewBasico" runat="server" Text="Basico"></asp:Label>
</td>
<td style="width: 312px; height: 21px">
<asp:TextBox ID="txtNewBasico" runat="server" Text='<%# Bind("precbasi") %>'
OnTextChanged="txtNewBasico_TextChanged"></asp:TextBox>
<ajaxToolkit:MaskedEditExtender runat="server" ID="txtNewBasico_MaskedEditExtender" TargetControlID="txtNewBasico"
Mask="9'999,999"
MessageValidatorTip="true"
OnFocusCssClass="MaskedEditFocus"
OnInvalidCssClass="MaskedEditError"
MaskType="Number"
InputDirection="RightToLeft"
ErrorTooltipEnabled="True">
</ajaxToolkit:MaskedEditExtender>
</td>
<td style="width: 2256px; height: 21px">
<asp:Label ID="lblNewRecargo" runat="server" Text="Recargo"></asp:Label>
</td>
<td style="width: 188px; height: 21px">
<asp:TextBox ID="txtNewRecargo" runat="server" Text='<%# Bind("precreca") %>' ></asp:TextBox>
<ajaxToolkit:MaskedEditExtender runat="server" ID="MaskedEditExtender1" TargetControlID="txtNewRecargo"
Mask="9'999,999"
MessageValidatorTip="true"
OnFocusCssClass="MaskedEditFocus"
OnInvalidCssClass="MaskedEditError"
MaskType="Number"
InputDirection="RightToLeft"
ErrorTooltipEnabled="True">
</ajaxToolkit:MaskedEditExtender>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblNewTotal" runat="server" Text="Total"></asp:Label>
</td>
<td style="width: 312px">
<asp:UpdatePanel ID="UpdTotal" runat="server">
<ContentTemplate>
<asp:TextBox ID="txtNewTotal" runat="server" Text='<%# Bind("prectota") %>'></asp:TextBox>
</ContentTemplate>
</asp:UpdatePanel>
</td>
<td style="width: 2256px">
<asp:Label ID="lblNewInicial" runat="server" Text="Inicial"></asp:Label>
</td>
<td style="width: 188px">
<asp:TextBox ID="txtInicial" runat="server" Text='<%# Bind("precinic") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblNewSaldo" runat="server" Text="Saldo"></asp:Label>
</td>
<td style="width: 312px">
<asp:TextBox ID="txtNewSaldo" runat="server" Text='<%# Bind("precsald") %>'></asp:TextBox>
</td>
<td style="width: 2256px">
<asp:Label ID="lblNewCuota" runat="server" Text="Cuota"></asp:Label>
</td>
<td style="width: 188px">
<asp:TextBox ID="txtCuota" runat="server" Text='<%# Bind("preccuot") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblNewConsignado" runat="server" Text="Consignado"></asp:Label>
</td>
<td style="width: 312px">
<asp:TextBox ID="txtNewConsignado" runat="server"
Text='<%# Bind("preccons") %>'></asp:TextBox>
</td>
<td style="width: 2256px">
<asp:Label ID="lblNewRetenido" runat="server" Text="Retenido"></asp:Label>
</td>
<td style="width: 188px">
<asp:TextBox ID="txtNewRetenido" runat="server" Text='<%# Bind("precrete") %>'></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 62px">
<asp:Label ID="lblNewComision" runat="server" Text="Comision"></asp:Label>
</td>
<td style="width: 312px">
<asp:TextBox ID="txtNewComision" runat="server" Text='<%# Bind("preccomi") %>'></asp:TextBox>
</td>
<td style="width: 2256px">
</td>
<td style="width: 188px">
</td>
</tr>
<tr>
<td style="width: 62px">
</td>
<td style="width: 312px">
</td>
<td style="width: 2256px">
</td>
<td style="width: 188px">
</td>
</tr>
<tr>
<td align="center" colspan="4">
<asp:Button ID="btnInsertar" runat="server" CommandName="Insert"
Text="Guardar" />
<asp:Button ID="btnCancel" runat="server" CommandName="Cancel" Text="Cancel" />
</td>
</tr>
<tr>
<td style="width: 62px">
</td>
<td style="width: 312px">
</td>
<td style="width: 2256px">
</td>
<td style="width: 188px">
</td>
</tr>
</table>
</InsertItemTemplate>
now codebehind:
protected void Page_Load(object sender, EventArgs e)
{
}
protected void txtNewBasico_TextChanged(object sender, EventArgs e)
{
if(fvPrecios.CurrentMode == FormViewMode.Insert)
TextBox txtTotal = (TextBox)fvPrecios.Row.FindControl("txtNewTotal");
TextBox txtBasico = (TextBox)fvPrecios.Row.FindControl("txtNewBasico");
TextBox txtRecargo = (TextBox)fvPrecios.Row.FindControl("txtNewRecargo");
txtTotal.Text = "hola";
}
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Jan 27, 2010
I have two formviews that I want to use together. I want the second formview to become visible based on a value in a textbox in the first formview using the item_inserted event of the first formview. How would I do this? What is the best way? Can I use the Ctype function?
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Mar 18, 2010
I have a formview and a few buttons outside the formview. How can i access the formview.itemcommand event if the buttons are not in the formview?
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Sep 26, 2010
So, to sum is up, I have a FormView:
[Code]....
And the relevant code:
[Code]....
What does work: I do see the right info if the formview is shown but when I click on the Update button it just doesnt fire the corresponding itemupdating event.
Can someone see what is wrong or missing?
What do I want to archieve: Just update the subscription's credits and its type: Upgrade, Prolong.
-edit-
New finding: I added 'onitemcommand="fvSubscriptionEdit_ItemCommand"' to the formview and a corresponding event method with a simple code that throw a exception(just testing) but it doesnt enter the method but does whine when the method is missing. So why does it whine if the method is not there but doesnt enter the method if it does exist? I presume that this is the same problem.
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Jan 12, 2010
In my table there is no record then I'm going to hide my formview fields on page_load event,
it gives an error "object reference not set to an instance of an object".
How can I hide fields in formview all mode?
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Sep 13, 2010
I am trying to validate data using the OnItemUpdating event on a FormView control. The event is fired when I click the update button but
e.OldValues["txtDate2"].ToString() in the function returns a null value. What am I doing wrong here ?
ValidateForm(Object sender, FormViewUpdateEventArgs e)
{
string val = e.OldValues["txtDate2"].ToString();
}
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Oct 4, 2010
I have a modal formview with insertitemtemplate. I have to click the insert button twice to fire the event.
But if I do not insert any values, only one click is required and the validationgroup fires. But if I enter all valid values, I need to click twice and the event does not fire during the first click. But I need CausesValidation = false because to required field validators.
How to avoid two clicks to fire the event if the formview is valid
[Code]....
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Jan 24, 2010
I have a formview that use the formview iteminserted event. The information inserts into the formview fine, but all cells blank out after the insert. How can I make it so I can show all the values I have inserted show up in the formview after the inteminsertedevent?
View 1 Replies
Jul 21, 2010
since APS.Net 4.0 I have a curious problem with an event.
There is a FormView and inside of the EditItem there is a GridView. In the Footer of the GridView I put Controls for inserting records.
But when I fire a markup defined RowCommand of that GridView then the same event is getting fired for the Parent FormView. First I had 'Insert' as the CommandName and so I was getting the Error that my FormView had to be in insert mode to insert a record. Then I changed the RowCommand of the GridView to 'xxx' and I got also the RowCommand 'xxx' at the RowCommand eventhandler of the Parent FormView.
The project was migrated from .Net 3.5 a few days ago, but nothing was manually changed in the code/markup. And the problem was not there with the "old" framework.
[Code]....
Of course, I could simply change the CommanName of the LinkButton e.g. to 'InsertChild' but I would like to know:
Is this a known change or a bug of ASP.Net 4.0?
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Jul 1, 2010
I have a checkbox inside a repeater like below..I'm having trouble figuring out how I need to tie the onclick event to a javascript function..I know I need to use somthing like
butSubmit.Attributes.Add("onClick", "return confirmSubmit();") but Since my checkbox is inside a repeater and I'm using master pages. I'm not sure how I need to use the findcontrol to so I can call the Add method?
I need to add an onclick to the ChkAll checkbox
[Code]....
View 6 Replies
Oct 18, 2010
formatting for an on click event in a hyperlink control:
[Code]....
I get an error with the using the <% %> within the onclick.
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Jun 8, 2010
Up till the moment I can not understand why the "SqlDataSource_NewAccount_Inserting" event of the formview's SqlDataSource is not firing!
The code inside the event handler is not executed, even the debugger does not stop on break points inside the "SqlDataSource_NewAccount_Inserting" function!
Here is my code:
[Code]....
[Code]....
I am using VS2010 and target .NET Framework 3.5.
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