I have a datagridview for user's input. For example, the columns are "Name", "Date of Birth"... For the "Date of Birth" part, i have implemented validaion... i want to make it that user have to enter a valid "Date of birth" before they are allowed to leave the Cell. Meaning once them entered the Cell, they have to provide a valid "Date of birth" then they can move on.
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I use the following code in a Sub called "updateDb" to accept changes back to the Db, etc. in the .CellEndEdit event from a DataGridView:
Try
' Write changes back to actual .mdb file
' Accept changes from DataGridView object
Me.Validate()
[code]....
Which is the most appropriate event to handle for this task? Right now I'm calling the updatedDb sub when the .CellEndEdit event triggers and when the .UserAddedRows event triggers.
The W3C validator tells meLine 256, Column 12: non SGML character number 0Both errors occur at the very end of the file.
Here is my abbreviated code:
dim writer as XmlWriter
dim xmlSettings as new XmlWriterSettings
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Visual Studio 2010 I am trying to learn Caliburn Micro. The sample project is presented in C# only (and runs OK) I have tried several on-line C# to VB converters, without success. Well the conveersion runs without error - - - but the Visual Studio editor chokes on the results. The principal problem seems to be with (what looks to me like) a Lambda. Advanced code conversions are really tough in any case, - but when you do not know C# nearly impossible.
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Is there a way to select the CurrentCell programmatically? I want to cycle through the list of SelectedCells and if they don't have a specific ColumnIndex then deselect the column. An error though is thrown when it reaches the CurrentCell though.
For i As Integer = 0 To (dgvStaffHoursNotes.SelectedCells.Count - 1)
If dgvStaffHoursNotes.SelectedCells(i).ColumnIndex = _
dgvStaffHoursNotes.CurrentCell.ColumnIndex Then
[code]....
i have a datagridview (Dg) with 7 columns.i have a RowValidated event which tests if the validated cell is the first (index = 0) then sets the focus on the third cell with columnIndex = 2 BUT the cell that's getting focus after the row is validated is on the next row not the row that's has been validated !!
Private Sub Dg_RowValidated(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles Dg.RowValidated
Dim colIndex = e.ColumnIndex
Dim RowIndex = e.RowIndex
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I am writing an program with multiple tabs. I have a class that reads a database and offers that data and other calculated data as a collection (the class is cEngines containing engine rows). I have another class which is a row (item from the list) of the collection (the class is RowData which is an engine). One of the tabs in the program contains a datagridview which is bound to the cEngines class and another tab contains controls bound to the RowData class. Both tabs have a mechanism for selecting/changing the RowData so that both tabs are syncronised. All of this works.
The RowData class has validation - both simple value checking, or more complicated checking based on other items in the class. A validation failure raises an event.
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How to show asp.net validation on button click event if i have 200 checkboxes and some of the checkboxes would be disabled and some are unchecked ... if user doesn't check any of the checkbox then asp.net validation control will display and user will be stay at the same page until they check any of the unchecked checkbox ..
View 1 RepliesI am using a template field in a GridView. The template field is a dropdown list that is generated dynamically in the RowDataBound event.
How can I add a Javascript validation to each of those dropdown lists when they're created?
I am writing a User Control. Into each control I am loading a custom biz object. Because the biz object implements IDataErrorInfo interface I am able to use the ErrorProvider control on the user control.
I am binding the ErrorProvider to the biz object like this:
Me.ErrorProvider1.DataSource=MyBizObject This is all working perfectly EXCEPT. The validation is happening (and therefore I am displaying the blinkey error signs next to all feilds) as soon as the User control is loaded into the host form.
Each biz object implements a SAVE method and I want the validate to not happen until the save event is triggered on the biz object.
My goal is to have the user be able to click the row and the row will be the selected row almost like having the select button but the entire row clickable to do the same thingthe error i get popups when i click the row, not when the webpage is loaded
this is the onrowdatabound portion i just added that causes the error
If e.Row.RowType = DataControlRowType.DataRow Then
' Get reference to button field in the gridview.
I have 3 textboxes. I want Button3 to remain disabled until ALL three are filled out. This seems to work, but for only ONE textbox:
If Textbox1.Text.Trim <> String.Empty then
Button1.Enabled = True
Else
Button1.Enabled = False
End If
I am drawing lines on a picturebox - not in the paint event. I realise that if I resize the PictureBox the lines won't be redrawn - but the PictureBox is fixed. If I display a MessageBox at the end of my draws the lines do not remain on the screen. This was OK with VB 6.0. Hoe can I stop them being erased?
View 2 RepliesI have dropdownlist and set autopostback Property to true.. the problem is that i when i change index of dropdown list Page gets postback. After Completion of Page load index of dropdown goes to 0 automatically.
How can i remain index of dropdownlist after Postback
im using my logic in the page load fn. i have an variable id. while loading page the variable id want to increment by 1 and value remain same... initially the id have 0 while calling the page load 4 times this value have to be 4.
View 6 RepliesFor some reason, every time I hit the red "X" button to close the program. The program closes, but the process is still there. How do I make it so that if I press it, itll end the process too?
View 6 RepliesIm opening an excel document with vb.net and i dont want vb.net to close it but to release excel so that when the user closes excel it does not remain as a running process... which it currently is doing here is the code i was using
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Recently I was working on a project in VB.NET, and I was encountering a mysterious problem with some of the DB connections. This was a project that I inherited from someone else and they had used something like this:
Dim reader As SqlDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection And CommandBehavior.SingleRow)
//after reading data
reader.Close()
It appears as though this was causing the connection to not close properly all the time. I've removed the CommandBehavior.SingleRow, and it seems to be working ok now, but I was wondering if anyone else has encountered this? Does anyone know why that would not work? I've seen CommandBehaviors combined in this way before, but it has never caused that problem before.
I am using a GridView with its first column as a template field with radio buttons.
I need to make the first radio button in the first row of the grid remain default selected during page load / postback.
I have 2 drop down lists and 1 submit button. It works such that after the user has selected values from BOTH the drop down lists, then the user will click a "Search" button. My problem is, after the user click the "Search" button, the second drop down list is no longer displayed with the selected value, instead it displayed a default value. May I know how can I make sure the selected value remain selected even after the user clicks the "Search" button on the page?
For your info, my coding goes as
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim strSelectedUsername As String
[Code]....
I have mdi application, on main form which is mdi container and has a tree view. i open the child form on afterselect even of treeview. the issue i'm facing that i open the form but focus remain on tree view until i click on the the form. my question is how i can give focus to form rather it stays on treeview. i tried frm.focus also activatemdichild(frm) no sucess.
View 21 RepliesI have a VB. Net App where I want the user to open a modeless form which contains reference information about items in a select box. If the user double clicks the item selected in the list box a modal form is opened to edit the item.I want the previously opened reference form to remain active/enabled, that is, I want the user to be able to click on it, move it, etc.I was able to get the form to at least show up on the task bar by setting it's "ShowInTaskBar" property to true, however, when it comes to the front the user can still not move it to the side to view all of the Edit Forms information.
View 7 RepliesNext listbox value:
1
2
3
4
5
6
7
8
9
10
11
I want to remove the first 9 lines remain in listbox:
10
11
I wan to create a program that can get the application name.i can start the program but cant get the program name[code]...
View 1 RepliesConcerning this code... Dim i1 As Integer = Nothing
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I have an id called "AM01". I separated them by truncating the numbers out and increase it by 1 each time I want to add a new record. Therefore before I add the record, I would have to combine them back. I managed to truncate them and combine them back. However, the results turn out to be "AM2" instead of "AM02". So, is there a way where I could make the numbers as "02" instead of just "2"?
View 6 RepliesI have a VB windows Form project that connects to several DataTables in an Access DB. On my form I have several textboxes, comboboxes and datetimepickers that are bound to those sources. With one table in particular when I try to update the tableadapter after editing one of the textboxes the update method fails. No exceptions are thrown, but the update method returns a zero value and the data is not updated. The update will work when just the comboboxes or datetimepickers are edited, but as soon as a textbox is edited also, update will not work.
Other DataTables within the project are set up in the same manner but are not having update issues. I can't figure out what about this one particular table is causing an issue. Can anyone give me any thoughts on where or what to troubleshoot?
I am currently trying to write a little wrapper around post-review to automatically post however this function fails when it comes to Dim results As String = sOut.ReadToEnd() and I can;t suss out why,
Edit: It doesn't produce an error it just seems to go into ReadToEnd() never to return
Function postReview() As String
Dim psi As ProcessStartInfo = New System.Diagnostics.ProcessStartInfo("cmd.exe")
psi.UseShellExecute = False
[code]....
Further Info: The actual command is working as I can see it posting to Review Board. But it just seems to get stuck in a loop while waiting on the Stream to complete. I have tried with Read and Readline with no luck?
I have a dropdown list that I am binding to a datatable. Here is the code I am using to do it:[code].....
Unfortunately, the line ddlBuildAddr.SelectedIndex = addressId is failing. Looking at this line through the debugger, the SelectedIndex goes to -1, while addressId goes to 2. What gives? Why would the assignment operator flatout not work?
My understanding of assert.fail was that if the line is executed, the test will fail.owever, I have found an instance where the assert.fail is executed, but the test passes.If the Assert.Fail statement is within a try block, the test will ALWAYS pass, even if the code execution executes the assert.fail. For example, the following test will always pass, even if the sub fails to throw an exception.
View 2 Replies