Asp.net - Datalist Name Not Declared When Using Code Behind?
Oct 24, 2011
I've run some code which extracts data from a database and presents it into a Datalist. It works fine when the script is on the aspx file, but when I transfer it to a code behind I get the following error
Compiler Error Message: BC30451: Name 'showIt' is not declared.
(showIt is the ID of the Datalist)Obviously, the Datalist markup is in my aspx page, and the script is in the code behind .vb file.As I say, it all works when the scripts are all on the one .aspx file.The code in the code behind is: (I've skipped the SQL and connection strings to keep this post concise)
Partial Public Class Data
Inherits System.Web.UI.Page
Sub Page_Load(sender As Object, e As EventArgs)
[code]....
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Dec 23, 2011
I'm trying to export the details in my datalist into a PDF file by using this third part program called Itextsharp. However, I'm encountering problems in generating the PDF as it keeps giving me the "Object reference not set to an instance of an object" error which points to my "htmlparser.Parse(sr)"
I been trying for 2 hours now to fix this problem however no progress. Does anyone here have experience in Itextsharp?
Here is the code that runs the export to PDF command
Protected Sub Button15_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Response.ContentType = "application/pdf"
Response.AddHeader("content-disposition", "attachment;filename=Resume.pdf")
[CODE]...
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Dec 27, 2009
I have my datalist in my project and I cannot get the label to code behing in VB. I tried below one and doesn't work; Dim Picture1Label As Label = CType(DataList1.FindControl("Picture1Label"), Label)
I want to replace the text of label named "Picture1Label" with "Photos/sungate.jpg" in a public shared function as follows;
[Code]...
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Apr 4, 2012
I want to change the color of the background of an item in datalist upon some condition while binding the data? How?
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Oct 27, 2011
I have a DataList inside another DataList. I want to access the child DataList "dlQuestion" events, ItemDataBound event. Also, I'm tring to find the control LableControl "lblQuestion" in the child datalist. How do I do that? Here's the mark-up:
<asp:DataList ID="dlSection" runat="server" Width="100%">
<ItemTemplate>
<div>
[code].....
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Aug 12, 2011
I have the following error is my code;
- Name 'F' is not declared
- Name 'H' is not declared
Am trying to insert the following paths at Label1 and Label2, respectively.
Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click
Label1.Text = F:Folder (3)TestzippingutilityTestzippingutility1
[CODE]...
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Nov 5, 2011
I have a old code in VB.Now I convert it into vb.net.There is a line in a code
Dim pCParameters As Integer
pCParameters = VarPtr(Parameters)
When I execute code the error occure that
[code]......
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Oct 25, 2009
How can you use XML that you have declared within your code? Also, what is the correct way to put it in your code?
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Aug 21, 2009
I have a code in VB 6 but doesn't in VB.NET. Even I was converting, but, there's a thing that I can't convert because I don't know what "hProcess" means .
Look at the code below:
Quote:
Public Const PROCESS_ALL_ACCESS = &H1F0FFF
Dim f1holder As Integer
Dim timer_pos As Long
[CODE]...
The error says: Name 'hProcess' is not declared.
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Sep 30, 2009
I am trying to bind a few values in xaml to variables declared in the code behind.
e.g.
vb.net
dim test as integer = 2
[code]....
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Feb 10, 2012
Option Explicit On
Imports System
Imports Microsoft.VisualBasic
Partial Public Class _Default
[code]....
I am getting error in the sheets and iffset liness.. it says
Sheets("Sheet1").Cells.SpecialCells(xlCellTypeLastCell)Offset(1, 1).End(xlToLeft).PasteSpecial(xlPasteValues), underlined words aren't declared
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Jun 10, 2009
This timer code is for VB6 and worked fine, It's to change the timer seconds into minutes, I'm not sure how to make this work for 2008 though.
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Timer1.Interval = 1000 ' set timer to 1 sec intervals.
Timer1.Enabled = False ' timer is off
End Sub
[code]....
the errors are...
Error1Name 'StartTime' is not declared.
Error2Name 'MinutesToWait' is not declared.
Error3Name 'StartTime' is not declared.
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Mar 6, 2009
I am trying to get a subset of locally declared methods in a webform code behind using GetMethods but cannot figure out the proper BindingFlags settings (see code below)....and some further specific questions:
1) Is it possible to differentiate between Procedures and Functions?
2) Furthermore, I only want to fetch a certain subset of these....is there some way I can decorate the ones I want with an attribute, and then further filter based on that?
Private Sub LoadFunctions()
Dim thisClass As Type = Me.GetType
For Each method As MethodInfo In thisClass.GetMethods(BindingFlags.Instance Or BindingFlags.Public Or BindingFlags.DeclaredOnly)
[code]....
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Jun 3, 2009
In re-engineering a windows forms application, I find that a lot of code-behind in the various form classes is duplicative and I'm trying to centralize as many procedures as possible into a base class which can be inherited and used by the subclassed forms.
This process seems to be going well and is making the code in my subclasses much simpler and hopefully easier to maintain, but I'm not sure where to draw the line between leaving code in the subclasses and engineering for generic resusability and moving it to the base class.
Specifically, in some subclasses I have code which manipulates variables and objects specific to the subclass, and although I could move the code-behind into the base class, the base class code references specific objects which are needed to compile. For example, each subclass manipulates a databound datagridview and form detail controls which allows the user to select between multi-record and detailed single-record views of a datatable.
In Visual Basic 2008 do I need to declare dummy data objects in the base class so that the base class will compile? Or is there a way to indicate that the data objects will be provided by the subclass?
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Feb 24, 2011
The following is a screenshot of the problem: What can I do?
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Mar 7, 2012
When converting the project from VB6 to VB.net. (All links to this classes were deleted: Microsoft.VisualBasic.Compatibility¸ Microsoft.VisualBasic Import System System.Data System.Windows.Form, using Framework 2.0)
I have this errors: Error 1 "MsgBox" not declared. It may not be available due to its protection level....RFrm.vb 1481 9 R
Error 2 "MsgBox" not declared. It may not be available due to its protection level. ...RFrm.vb 1481 135 R
Private Sub _Command4_0Microsoft.VisualBasic.Left_Click(ByVal sender As System.Object,_ByVal e As System.EventArgs) Handles _Command4_0.Click
[CODE]...
And another question, off-topic. Which operators can be replaced with VB.net operators: IsNumeric, Mid, Microsoft.VisualBasic.Left.
The function checks for the input only the digits.
With Text9
If .Text <> "-" And Not IsNumeric(.Text) Then .Text =_
Microsoft.VisualBasic.Left(.Text, .SelectionStart - 1) &_
Mid(.Text, 1 + .SelectionStart)
End With
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Mar 27, 2012
I have been searching around the web for a solution to this issue but have come across nothing so far.Basically I have a table as shown below, which I made up of ItemTemplate fields and is populated by a DataSet from my database. It shows brands to the user of which they can then click and go onto another page.I need to add another option to the table called "All Brands". Thus then I can use this to go to a page showing all the brands.However I can not seem to easily add this into the DataList.
<asp:DataList id="TypesList" runat="server" Visible="true" RepeatColumns="3" Width="100%" ItemStyle-Width="25%" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
[code].....
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Jun 6, 2011
I am using an asp.net Datalist control. I have a table titled 'Category' with two columns 'Category Id and Description'. When I display the results on my webpage the 'CategoryId' number comes up and not the Description. I want the Description that corresponds to the number. I want to write it to my label control 'lblCategory'. Using ADO.NET I am having trouble with what to put between:
[Code]....
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Oct 13, 2009
I'm having problem getting all the values in datalist?I have datalist which is populated dynamically from table in database, the aspx page is the bulk order page so there are many items in datalist and I want the user to be able to selct multiple orders at once in mode and select a buuton in which is called check out, The question is how do I loop throuhg all the checkboxes and textboxes and get the value.
here is my aspx page:
<asp:DataList ID="DataList1" runat="server" BackColor="White" BorderColor="#CCCCCC"
BorderStyle="None" BorderWidth="1px" CellPadding="3" DataKeyField="Id"
DataSourceID="SqlDataSource1" GridLines="Both">
[code]....
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Aug 20, 2009
I have a datalist. I have datatable in javascript. I want to set datatable as datasource to datalist in javascript
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Feb 22, 2012
I want to hide an item in datalist according to some condition suing ItemBound, how ?
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Feb 3, 2010
I'm stuck in converting the rate in the datalist. My page contain one dropdownlist(currency converter), one datalist - inside contain the price of bags in labels. Now I uses the dropdownlist.selectedIndexchange
Protected Sub ddl_rate_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddl_rate.SelectedIndexChanged
Dim lbl_rate As Label = roomList.Items.Item(0).FindControl("lbl_rate")
[Code]....
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Jun 13, 2011
I have a table called Sort with columnds sortID and sortname. I'm displaying my results in a datalist. I also have a table called Colors with colorid, sortId and shade. On my display I am selecting the results from the Colors table. But for the
SortId column I just have a number. Each sortId already has a sortname in the database. How do I get it so that the display page displays the sortname rather than its corresponding sortId name. Here is what I have: Sincerely, Computergyrl
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Feb 23, 2009
I am completely Goggled out on this one. We currently have a datalist consisting of rows of data for our company. What I need to do is to add a link into the individual cells of a particular column called candidate profile. The link will be View Notes. When that link is clicked, I would like to have a new row expand right below the existing row to allow the additions of comments in the empty row. When the user comes to the page and there are existing comments for the row of data, have it expanded and give the user the ability to expand, or close the comments as they see fit. I also need to figure out the best way to allow the user to enter in the comments as well.
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Jan 13, 2010
Dim z As Label = DataList1.Items(0).FindControl("ProdIdLabel")
this is what i've..but unfortuantely it'll only retreive a single record is there any other way to get data from datalist?
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Feb 8, 2012
I have a datalist, and each item in the datalist has a checkbox and disabled button, I want when the checkbox is checked, the button will be enabled. How to access the check box event for an item in the datalist ?
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Aug 8, 2011
how I would put a maximum of rows in a datalist. I have the program reading from a db and I just need to limit the amount of users in the view. The database is organizing the users according to rank and I have it so that it will read the users by rank in descending order (highest rank 1st) I need to limit it to 5 users. Is there a method for this? P.S. I put this here because I know that this is more of a vb.net code oriented question(limiting amount of data shown by an object)
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May 28, 2012
I wanna show some values of variables (about 6) inside item template of a Datalist. let's say if i have
Dim A As String = "hello world"
I wanna show that inside the Datalist. Dim A needs to be declared on Page Load or in a method somewhere .. coz the source is the database,so i can't just declare as public const on the top of the page.I tried this in Datalist but i won't work as expected.
<%= a %>
I also tried putting that different places like ItemDataBound or Page init. it won't work if the way i did was wrong.In the datasource of Datalist is a datatable with other data. So it is like i am having more than one source for Datalist. Is there any way around other than putting that Dim A inside the datatable?
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May 20, 2009
I have a datalist control that is not retaining it values during postback when the control causing the postback is outside of the update panel that the Datalist resides in. I have verified that viewstate is on for that usercontrol as well as all its parent controls. My basic situation is that I have a Datalist that contains a user control on a page. When the user selects several rows in a grid and presses a button, a datatable is filled on the backend and assigned to the Datalist which has its item template set to the UserControl.
On ItemDataBound I set specific properties in the control which customize the messages on that control to the specific item. This is then popped up using the AJAX Control Toolkit Modal Popup[ Extender. When the user presses Save the whole page posts back. Data is collected from the user controls and saved to the DB and the popup disappears. The issue I am currently having is that the DataList has 0 items when the save button is pressed instead of the appropriate number. THis issue just started appearing after we upgraded from .NET 2.0 to .NET 3.5.
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Aug 4, 2010
In datalist, I hve populated Grdiview.In Gridview , I hve checkboxes. Now i want to get the selected checkboxes names to be insrted into the database when clicking the button.so far i have tried like this
Protected Sub butn_Submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles butn_Submit.Click
Insert_CATEGORY_Info()
[code]....
the result is
"foundObject reference not set to an instance of an object. "
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