I am a developer relatively new to Visual Studio 2017.
I created a Windows Forms App to maintain legal visitor data but am experiencing this issue:
Symptoms: Receiving error (Concurrency violation: the UpdateCommand affected 0 of the expected 1 records)
I can Add records and edit records no problem, but this error only occurs when I:
Add a record successfully and then try to Edit the same record directly
(In other words, I get the error when trying to re-edit the same record).
Can anyone please assist?
-Add Button calls this:
Private Sub InsertData()
-Edit Button calls this:
Private Sub UpdateData()
I have the the same problem with update command method.
The program have enlisted, like this
Dim i As Integer
Dim update1 As String = (“update datamahasiswa set no= ’” & TextBox1.Text & ”’ where nama= ’” & TextBox2.Text & ”’”)
Me.LatihanDataSet.Tables(0).Rows(1).Item(1) = TextBox1.Text
i = DatamahasiswaTableAdapter1.Update(LatihanDataSet.datamahasiswa)
Catch ex As Exception
MessageBox.Show("no of rows updated=" & i)
After I run this program, the message show like this :
Update requires a valid update command when passed data row collection with modified rows.
It means that the update method have not run well.
When I try to insert the EXCUTE Query, this command have not been in VB.net.
I want to extract class attributes of specific text which is present in the pdf files, for ex: If I want Date paid text class attribute from pdf file, When i double click or hover the Date paid text in pdf it should return class attributes like:
Was going to make a offline install disk of the Community Edition of VS 2017. Can't even do that without surfing through bullshit. The file you download isn't good enough. Now they say you have to update Windows 8.1. So I try to do that and they say "this update not applicable for your computer".
Oh yeah...if you have the time or patience you may discover something called a hotfix that you can install first.
Oh so let me see...
You gotta download one file to your drive to discover it doesn't work properly. Then you do what they tell you to do only to find out that doesn't work either.
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It should be in the Project's intermediate output folder, usually called Debug or Release, depending on the build type. You should take a good look at the solution directory tree and get familiar with the different directories and what they are used for. Also look at project properties and expand the Macros link to see all the macro expansions that are available.