Forms Data Controls :: Control Parameter EVAL From A Formview Item
Aug 31, 2010
I have a Formview ('formview1') with a pager. I also have a gridview ('gridview1') linked to a SQL datasource ('History'). I need to set the SelectParameter ('Serial') of the datasource to be the value of a field on the current page in the formview. The value i need to get is in the ItemTemplate and is a label called 'SerialNumberLabel'. So, something like:
<SelectParameters>
<asp:ControlParameter Text = "Eval fromview1.currentpage.itemtemplate.SerialNumberLabel" >
I also need to ensure that the SQL source and gridview rebind when the pager is activated.
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May 14, 2010
I am doing a library application. I am using a formview control to display and edit the details of an existing borrower.
What I wish to do is to allow the user to enter the borrower barcode into a textbox and select the details of the borrower corresponding to the barcode.
At present I have kept the textbox and a button outside the formview. Once the user enters the barcode in the texbox and clicks the button, the data is displayed in the formview control.
Now, my doubt is that is there a way to keep the textbox inside the formview control itself and use the value(Which should be user input) for selecting the details?
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Jun 14, 2010
I Have an InsertTemplat in FormView that has a DD List.
I also have an Insert Parameter in a SQLDataSource that tries to reference it but can't.
Is my only solution to use event code to move the data to the SQL Parameters?
[Code]....
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Nov 12, 2010
I'm using visual web developer and MS.Access and have the following created. 1. A formview control to enter data into the database 2. A File upload control that allows users to upload files. But however i'm unable to include the file upload control in the formview control. How can i achieve this? Below is the code for the page:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="NewRecord.aspx.cs" Inherits="NewRecord" %>
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Jun 4, 2012
I hv a grid in which autogenerate column is false.i want to check condition which is like this
<itemtemplate>
<% if <%#Eval("xy")%> is not null then%> .........error line
<b><%#Eval("xy")%></b>
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</itemtemplate>
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Apr 16, 2014
Iam using the below code in ASPX for displaying images that are present inside my website project folder
<a href=""><%# Eval("Columnname","Foldername/{0}") %></a>
eg:
<%# Eval("Gallery","ImageFolder/{0}") %>
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Sep 9, 2010
i have this :
label_show and formview1 and a button1.
and a label_name in formview1 .
i wana when i pressed button1 >> label_show.text = formview1.label_name.text
how i can do it ?
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Nov 11, 2010
i have a gridview that displays an image from database - in the item template i want to add an / before the
bind below / so its gets appended to the value
[code]....
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Apr 27, 2010
i already have a DataList, and i get any information from the rows i need by adding code such as:
[code]....
Well what i am doing there is using the values from the items that the DataList has obtained from the rows, now, what i need to do is EXACTLY the same, but for the FormView, i realised that this code does not work for the FormView, but only DataList control.
give me the code for doing exactly as shown, but for the FormView control.
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Jan 24, 2010
how can I get the ID of the item that inserted into a formview? I want the ID to appear in a textbox right after the insert. How can I do this?
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Mar 21, 2010
I have a formview bound to a sqldatasource control. I want to set one of the insert parameters when I click on one of several buttons (outside the formview).
In my sqlDS I have:
<InsertParameters>
<asp:Parameter
Name="benType"
Type="byte"
/>
<asp:Parameter
Name="benName"
Type="String"
/>
<asp:Parameter
Name="benDesc"
Type="String"
/>
</InsertParameters>
I want to set the "benType" depending on which button I've pressed (I don't want/need it to be visible in the InsertTemplate). I tried adding this line to the codebehind for the button click:
formview1.ChangeMode(FormViewMode.Insert)
formview1_datasource.InsertParameters(0).DefaultValue = 2
This doesn't work...what is the best way to set the insertParameter from outside the formview?
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Jun 12, 2010
I have been trying for a while to populate a formview when I select an item from the dropdownlist. The dropdownlist is outside of the formview. For some reason, when I select a different item it does not change in the formview. Only the first item of the list shows up. I don't know where I'm doing wrong. I tried many things and suggested informatioin and I still could not get it to work. When I do try to switch I get this error message:
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
[Code]....
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Mar 27, 2010
I wish to remove the edit button in the formview item template if a particular user is not authorized, how do you accomplish the removal?
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Jul 17, 2010
I have a Formview residing inside am Item Template of a Gridview. The formview is not populating, and I am pretty convinced that I am not passing the parameter properly from the Gridview to the Formview. I have listed the relevant code only, so that you can scan though it easierGridview tag:
[Code]....
Gridview's Datasource:
[Code]....
Formview's tag inside Gridview template field:
[Code]....
Formview's datasource:
[Code]....
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Jan 12, 2011
I have a formview with both edititem template and item template as following:
<asp:FormView ID="PFTFormView" runat="server"
DataKeyNames="PFTId"
EnableModelValidation="True" Width="90%"
OnItemUpdating="PFTFormView_ItemUpdating"
onmodechanging="PFTFormView_ModeChanging" >
<EditItemTemplate>
<table>
<tr><td class="style1">PFTId</td><td class="style3"><asp:Label ID="lblPFTId" runat="server" Text='<%# Eval("PFTId") %>' /></td></tr>
<tr><td class="style1">Last Name</td><td><asp:TextBox ID="txtPFTLastName" runat="server" Text='<%# Bind("PFTLastName") %>' Width="200px" /></td></tr>
<tr><td class="style1">First Name</td><td><asp:TextBox ID="txtPFTFirstName" runat="server" Text='<%# Bind("PFTFirstName") %>' Width="200px" /></td></tr>
<tr><td class="style1">Home</td><td><asp:TextBox ID="txtPFTHome" runat="server" Text='<%# Bind("PFTHome") %>' Width="200px" /></td></tr>
</table><br />
<asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True"
CommandName="Update" Text="Update" />
<asp:LinkButton ID="UpdateCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</EditItemTemplate>
<ItemTemplate>
<table>
<tr><td>PFTId</td><td><asp:Label ID="lblPFTId" runat="server" Text='<%# Eval("PFTId") %>' /></td></tr>
<tr><td>Last Name</td><td> <asp:Label ID="lblPFTLastName" runat="server" Text='<%# Bind("PFTLastName") %>' /></td></tr>
<tr><td>First Name</td><td><asp:Label ID="lblPFTFirstName" runat="server" Text='<%# Bind("PFTFirstName") %>' /></td></tr>
<tr><td>Home</td><td> <asp:Label ID="lblPFTHome" runat="server" Text='<%# Bind("PFTHome") %>' /></td></tr>
</table><br />
<asp:LinkButton ID="EditButton" runat="server" CausesValidation="False"
CommandName="Edit" Text="Edit" />
</ItemTemplate>
</asp:FormView>
on my code behind, I have:
Sub PFTFormView_ItemUpdating(ByVal sender As Object, ByVal e As FormViewUpdateEventArgs)
Dim PFTObj As New PFT
Dim PFTDST As New Data.DataSet
Dim newPFTLastName As String = DirectCast(PFTFormView.FindControl("txtPFTLastName"), TextBox).Text
Dim newPFTFirstName As String = DirectCast(PFTFormView.FindControl("txtPFTFirstName"), TextBox).Text
PFTObj.PFTLastName = newPFTLastName
PFTObj.PFTFirstName = newPFTFirstName
PFTObj.PFTHome = DirectCast(PFTFormView.FindControl("txtPFTHome"), TextBox).Text
If PFTObj.UpdatePFT(Session("PFTId")) Then
Me.lblErrorMessage.Text = "PFT Update Successfully"
Else
'
Me.lblErrorMessage.Text = "PFT Update UnSuccessfully"
End If
PFTDST = Nothing
PFTObj = Nothing
end sub
The problem is:
PFTObj.PFTLastName = newPFTLastName
PFTObj.PFTFirstName = newPFTFirstName
PFTObj.PFTHome = DirectCast(PFTFormView.FindControl("txtPFTHome"), TextBox).Text
are not returning the updated value from the form.
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Mar 15, 2010
In web config file I have add key values specified.
In the formview I have labels on edit , item and insert mode that I want to display all the time by getting those values from web config. I'm able to do that with no problem but when I change the modes between edit to insert or item view, I lose those label values until I hit the "select" twice from the Gridview, those values re-appear. Below is the snippet of the code. What do I need to do to retain the category values all the time?
[Code]....
[Code]....
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Jul 22, 2010
I wish to add a sub to vb file that changes the display value of several asp:panels located in a Formview Item Template. My only question is what is the proper event to run this in. (databound, item created etc...) If it matters this formview appears in a Gridview Item Template.
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Sep 8, 2010
I have a repeater I've databound with a generic arraylist from a LINQ query (.ToList() ) in the code behind.
I was using
<%# Bind("FirstName")%> but noticed
<%# Eval("FirstName")%> works just as well.
Is it better to use Eval or Bind? or does it depend on the situation?
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Apr 8, 2010
i have the following scenario: one formview. when in editmode there is a child formview linked to the other by a column value. i need to take the value of one of the values of parent formview controls and set it to a textbox of child formview in insert mode. I wish to know which event should I use in codebehind to bind both controls? (that escenario will have paging and must keep the binding as if it was master detail)
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Jul 9, 2010
I have a HyperLink control in a ListView, and I need to pass a couple of querystring parameters.
[Code]....
The first parameter is based on the current DataItem value in the LV.
Suppose I want to set a second parameter with a value from Selected.Item.Text in a DropDownList on the same page, how would the HyperLink look?
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Mar 9, 2010
I have a big problem...I have made a page has a Data FormView controland the insert template of this Formview control has DropDownList to allow the user to choose section (SectionsDDList)..and there's also another DropDownList allow the user to choose a teacher (TeachersDDList)...more infothe SectionsDDList get the section list from SqlDataSource control which the "Select Command" of is:"SELECT section_id,section_id FROM sections"the TeachersDDList get the teachers list from another SqlDataSource control which the "Select Command" of is:"SELECT teacher_id,teacher_name FROM teachers WHERE (section_id = @section_id)"finallyI want the TeachersDDList to be filled with teachers according to the selected section from the SectionsDDList...So,I enable the Auto postBack function of the SectionsDDListand add the next code for the SectionsDDList_SelectedIndexChanged event:TeachersDataSource.SelectParameters["section_id"].DefaultValue = ((DropDownList)sender).SelectedValue;be aware that both of the SectionsDDList & TeachersDDList have been Bounding to a column...and the problem I have faced is that:Exception Details: System.InvalidOperationException: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.maybe you want to know the Stack Trace:[InvalidOperationException: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.]
System.Web.UI.Page.GetDataItem() +93
System.Web.UI.TemplateControl.Eval(String expression) +33
ASP.cpanel_managecourses_aspx.__DataBinding__control82(Object sender, EventArgs e) in
[code]...
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Feb 2, 2011
How to add blank item in dropdownlist without using appenddatabounditem after control parameter refresh?
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Mar 28, 2011
I am attempting to insert an items using a basic FormView control.
The FormView has standard entries like:
ItemName
ItemPrice
ItemSize
It also has controls that will be hidden from the user such as:
ItemDateCreated
ItemDatechanged
ItemChangedBy
..These items I am attempting to modify their values before the Insert() takes place, so I have captured the event InsertButton_Click():
protected void InsertButton_Click(object sender, EventArgs e)
{
LinkButton btnInsert = (LinkButton)FormView1.FindControl("InsertButton");
TextBox txtDateAdded = (TextBox)FormView1.FindControl("ItemDateAddedTextBox");
[Code]....
It keeps telling me that the ItemName field is NULL, and throws an error, even though I can plainly see the value is being set in the textbox. Why is this value being thrown as NULL? Do I need to manually create the INSERT statement before I call the Insert()? How would I go about doing that?
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Oct 22, 2010
I have got a drop down list in a gridview and would like to pass eval() as parameter to javascript..
<asp:DropDownList ID="ddl_grprowcutter" runat="server" onchange='<%# "fn_ddl(" +Eval("Order_No") + " );" %>'
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Jan 2, 2011
I am currently able to pass parameter from 1 page to another but I am unable to retrieve it.
<asp:HyperLinkField DataNavigateUrlFields="ID"
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