Binding Validation Controls In A Datagrid?
Feb 15, 2012
I have the following datagrid:
<asp:DataGrid runat="server" ID="gastosReembolsables" ShowFooter="True" AutoGenerateColumns="False">
<AlternatingItemStyle CssClass="DATAitem2"></AlternatingItemStyle>
<ItemStyle CssClass="DATAitem1"></ItemStyle>
<HeaderStyle CssClass="DATAheader"></HeaderStyle>
<FooterStyle CssClass="DATAitem1"></FooterStyle>
<Columns>
[Code]...
all bindings work except the ones in the validation controls for the itemtemplate of the last column (they are passed as text to the web page). Why is this happening? is it even possible to do what I'm trying to do?
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Oct 18, 2010
binding navigators, datagrid view, binding source are all sql database parts.Will these parts still work if you havent got sql on you pc and your not using an database file (.log and .mfd) and your not coding to them, im using MS Jet/Oledb to code to Excel.What not to put on an Employee evaluation: This employee has hit rock bottom and shows signs of starting to dig.
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Jan 4, 2010
I have a form with a binding navigator on it. It also has a DGV and text boxes bound by the binding navigator. Everything works fine. If you scroll through the row's in the binding navigator it updates the DGV and text boxes at the same time. And also if you click any row in the DGV it automatically updates the text boxes.
Ideally I want to impletment some validation to make sure the users are not only filling in all the required text boxes but also that the data entered is correct.
I have some validation setup in SQL, for example not allowing nulls on particular columns but I really need to be more extensive in the validation than that.
Ideally I need some way of validating the current row selected whether it's an existing row or a new one, before moving to the next row or before save is clicked on the binding navigator. Firstly because the SQL validation messages are not very good, secondly because whilst the data may meet SQL's requirments, it may not be right. For example SQL might accept 12:00 as a time but the program specification requires the user to input within a certain time frame, i.e. 14:00 - 16:00.
Finally, I feel like the validation needs to be handled immediatly on the record that is displayed as ultimatley, the way the form is setup, allows the user to add and amend more than one record at once and if the validation was handled on 4 or 5 different rows then it would bring another problem of having to bring each row up to correct. Therefore I think the best aproach is to handle each row before allowing the user to move onto another one.
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Feb 5, 2009
Using Binding Navigators to tables in datasets. How are you all managing putting default values into new records? How are you handling "general" row validation before allowing them to save the record? We actually save on the current change event of the BN right now - client does not want to use a save button. But still how would you "stop" the current change from happening if the record was not yet valid enough (like filling a couple of foreign key fields)?
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Aug 9, 2009
Using VB 2005. I am attempting Object Binding, with a validation class that handles the validation at the object properties. But, it is working fine for strings only. For any numbers and dates fields on the form, if I simply enter and leave the text box without entering any data, the validation doesn't kick in. It does only when the text box is dirty (an empty string ?), if I enter something and erase it (backspace), the errorprovider is not letting go unless I fill in something that conforms to the data type of the text box and says the input is not in the correct format / type. And at this point, the object property is yet to be assigned any value, and hence my validation class is yet to activate and do its job.
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Nov 27, 2009
I have a form which imports a CSV into a datagrid. I have validation for new row, which has error provider appear on form. How can I add validation to the datagrid once the CSV has been loaded to flag that a certain cell must be completed for saving. I can do it in my dataset for new rows:-
Partial Class ContactsDataSet
Partial Class ContactsDataTable
Private Sub CheckContactName(ByVal contactsRow As ContactsDataSet.ContactsRow)
If contactsRow.IsNull("Name") OrElse contactsRow.Name = "" Then
contactsRow.SetColumnError(Me.NameColumn, "Must be completed")
[Code] .....
How can I do it for existing rows or imported rows or get error provider to appear on every cell (called Name) that is empty?
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Dec 20, 2011
Any way to apply some validation rules to the following code?
VB
Private Sub dgOperator_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgOperator.EditingControlShowing
Const cSUBNAME As String = "dg_EditingControlShowing"
[Code] .....
Another thing should I be applying this validation on the Id Op'rateur column or when I click to the edit the next column in the datagrid i.e. Description?
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Dec 15, 2011
I need to validate a particular coloumn in datagrid for duplicate values before inserting into database. I am using datatable.
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Aug 11, 2010
Using ASP.Net MVC1 and am dynamically creating the html in a model that is then dropped into the view and rendered at run time.
My view is a single page that looks like this:
<%@ Page Language="VB" Inherits="System.Web.Mvc.ViewPage" %>
<%=(ViewData("Content"))%>
This dynamically created content is mostly dropdownlist boxes in the format of
<form method=post action="/questions/nextBatch">
<div id="text">What is your preferred drink?</div>
<select>
[Code]....
Is it is possible to perform validation on the dropdowns lists to ensure that a value has been selected? If any of the dropdownlists that still have the default value (the "please make a selection" text) the page is then redisplayed with the font colour of the question or dropdownlist box changed to say red?
I'm from the Webforms world and have made the switch over to MVC (which I really like!) and I know there are some pretty slick validation tools out there but you seem to have to account for them within the view itself.
I cannot pass a HTML helper through the viewdata of the controller as it does not render unless it has been coded directly into the view itself.
Also, I'm looking for a pure asp.net solution as I cannot use javascript due to accessiblity concerns. I can access all the values of the dropdowns without any problems throug the formscollection object but from there I'm a bit stuck.
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Apr 22, 2010
I want to search an ASP.net form for all types of validation controls and programmatically add some attributes to them such as ForeColor.
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May 18, 2012
My asp.net page has multiple text-boxes and DropDownLists that all have required-field validators.
My site also has multiple pages that you can move between with the click of a button. (All pages have all the buttons) When a page loads and decide I want to go to a different page without entering information into the form, I click a button to move to a separate page and the validation pops up and I can't change the page, it stops me every time?
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Apr 30, 2010
What would be the best forum on MSDN to ask a question about the Validation Web Controls. And using them with ASP.Net?
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Jun 6, 2010
I cannot figure out why HeaderText or validation controls always fallback to default culture - even though rest of the controls are in correct culture.
I have a GridView with HeaderText specified in this way>
<asp:BoundField DataField="totalSales" HeaderText="<%$ Resources:Strings,TotalSales %>" />
In the same way I have validation controls and they can't be localized.
Only this syntax does work: <%= Resources.Strings.Payments %>
I set different culture in Master page using this statement in Page_Init[code]...
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Aug 24, 2011
I'm currently working on a data entry application in VB.NET and I'm using data-bound controls by simply dragging the table from the Data Sources window onto the form. It's my first time doing this, but this will save me quite a bit of time since this table has plenty of fieldsAnyway, my problem is that when I enter an invalid value in a textbox and then delete the text it won't let me select other controls or even close the form!
For example, say I have an Age field in the DB, which is an int and I mistakenly type "," on its textbox. Then I decide I actually want to leave that field blank (considering it allows nulls) so I just delete all of the textbox's contents, after doing so, I'm not able to switch focus to another control or close the form.
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Jun 3, 2011
I'm trying to bind an Array to a DataGrid using VB.NET (2008), and I get an error. Array was not one-dimentional arra
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May 3, 2012
I'm trying to bind a dataset to a datagrid. I've found many examples online... all look similar to below. My problem is that the bind seems to work, but nothing shows on the datagrid. It's blank. Both rowcounts in the message boxes display the correct number of rows for both the dataset and datagrid. Does something need to be initialized in the datagrid properties?
[Code]....
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Dec 29, 2009
I am novice in WPF. I have a wpftoolkit datagrid where i am using a combo box as datagridcombox column. I am using a observable collection of Codes for binding the combo box. Below is the collection and its class...
#Region "Class & Coll"
Public Class CodesColl
Inherits ObservableCollection(Of Codes)
[Code]....
Unable to display the codes in dropdown. Somehow i manged to do so but it disappears after loosing focus from the combobox. Unable to retrive the description on its selection change as , i am unable to find the event too.
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Dec 13, 2011
I am trying to delete a customer record. In the page I have an usercontrol for address and it has some validation. I cannot delete the record since it fires the validation controls.
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May 26, 2010
I'm using a the WPF DataGrid from the wpf toolkit and a TimePicker from AvalonControlsLibrary to insert a collection of TimeSpans. My problem is that bindings are not working inside the DataGrid, and I have no clue of why this isn't working.Here is my setup:
I have the following XAML:
<Window x:Class="TestMainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wpf="http://schemas.microsoft.com/wpf/2008/toolkit" xmlns:a="http://schemas.AvalonControls/AvalonControlsLibrary/Controls" SizeToContent="WidthAndHeight" MinHeight="250" MinWidth="300">
<Grid>
[code].....
EDIT 1: I forgot to mention that the binding to SelectedTime TimeSpan works as expected. The problem are the bindings inside the DataGrid.
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May 14, 2009
I have a really simple xml:
dim myXml as XDocument = _
<?xml version="1.0" encoding="utf-8"?>
<root>
<RecordNumber id="1">
[Code].....
I get element information and the data in my grid. Plus the grid is showing the columns of data as rows.
I got this idea from the Beth Massi show, but She use Linq to SQL, (which looked really easy). So I thought, well, what the heck, its all iEnumarable...
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Mar 5, 2009
VS 2005 [RESOLVED] biniding data to a datagrid
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Jul 2, 2009
If I load a datatable, and then set a listbox properties pointing to it, I get the right data, e.g.:
[code]...
I get System.Data.DataRowView instead of my actual data.I don't understand how the databinding is actual happening, and how I refresh my the data in the control when the data changes.
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Mar 15, 2012
I have a datagridview bound to a datatable. I want replace one of the cells with a combo box and bind that combobox to one of the columns in the datatable. I have been able to replace the cell OK but currently have two issues I have not been able to resolve.
1. When I add items to the drop down (items.add ("Yes")...) they don't appear in the drop down box.
2. I can't figure out the syntax to bind a particular column in my datatable to the newColumn(combobox) in the datagridview.
dbConnection = New OleDbConnection
cmdCommand = New OleDbCommand
Try
[Code].....
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Jun 20, 2012
I am using below mentioned Ado.net function and resultset bind with grid view, however I am getting the duplicate rows in the resultset.
[Code]...
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Feb 26, 2009
like this i have n number of questions in my word document. so my need is i need to read the questions and fill it up in the datagridview with yes or know chek box. my datagridview appearance would be as follows. so the peson who is viewing the questions and can make yes or know option using the check box.if the person chooses no option he has to enter the reason the reason column. so i have to do this dynamically. means that binding datagridview with checkbox ,textbox, data dynamically. how to do this please because after the datas entered in the datagridview i have to loop through rows and i have populate into another word document. so please if there is any sample
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May 9, 2012
I want to be able to control several groups of settings independently of each other. I'd originally used My.Settings, but it was too much work to manually rollback some settings whilst saving others.
I thought my solution was to use multiple settings files, and I've had moments where this seemed to work, but I whatever success I have had is periodic and temporary.
Currently I have two settings files in the root of the project; In code, I can access the settings OK, but in many cases I want to bind individual settings to controls. This should be straight-forward, and I recall it working when I used the single, built-in settings file.
However, when I use the two new settings files it doesn't work. In the Formatting & Advanced Binding dialog, I select Add New Project Data Source, I browse into my project, then into the root namespace, and then I see my forms/classes/settings files. When I select the two settings files, and click OK, the dialog is dismissed without me being able to select an individual setting to bind the control to.
When I enable Project > Show All Files, I can see that the binding has been created; I have two .datasource files under My Project > Datasources.
Is there some reason why I shouldn't be able to bind to these settings files? If not, why can I not access them the the data-binding dialogs?
Plan B is to create an object to act as an intermediary between the controls and the settings files, but I'd rather avoid this if I can.
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May 19, 2010
I have a form that with a list of text boxes. My target is simply binding these controls to an XML file so that whenever the file contents are changed externally, the text box values change dynamically. I will have an external application edit the XML file and overwrite the existing one.
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Mar 20, 2009
I have yet to find a "nice" way to do two way databinding in .Net. The one thing I don't like for example in the present asp.net two way databinding is doing the binding in the aspx page is no compile time checking, ie:
<asp:TextBox ID="TitleTextBox"
runat="server" Text='<%# Bind("Title_oops_spelled_wrong") %>'>
I would like to have something like this:
Class Binder
Public Sub BindControl(ctl As Control, objectProperty As ???????)
'// Add ctl and objectProperty to a collection
End Sub
What I don't know is possible is, how to receive the objectProperty in my example; I want to receive a reference (ie: a pointer) to the property, so later, via this reference, I can either read from or write to the property.
Can this somehow be done with delegates perhaps??
UPDATE: Note, I want to add the control reference to a binding collection, this collection would then be used for binding and unbinding.
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Oct 27, 2011
I'm having trouble with some Silverlight functionality. My goal is to get some data from the database and display it in my grid. Sounds simple, however, there are 7 columns that are always going to be there.
The rest of the columns depends on the account. There could be 2 (called Actions) associated with a certain account, compared to another account that could have 5, and the action names can be completely different.
I have successfully been able to return a list of all the possible actions for the given account, and then adding the columns to the grid in the code bihind(VB), and I can bind my data to the grid for all the columns that are already known. The way I store the item's actions, is a Property of type List. My problem is finding a way to iterate through the actions list of the Item object in order to bind those actions to the grid.
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May 7, 2012
I have a client who needs a database to display products.He would like to have the product attributes in the rows headers and new records added to the columns. I have a collection of a class that would contain the products and am binding it as a data source. however all I can get is the attributes to show up in the columns and the records to show up in the rows.
[Code]...
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