.NET (Core and Framework)

1. Read the question carefully
2. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar
3. If a question is poorly phrased then either ask for clarification, ignore it, or mark it down. Insults are not welcome
4. If the question is inappropriate then click the 'vote to remove message' button

1. Choose the correct forum for your message. Posting a VB.NET question in the C++ forum will end in tears.
   
   
2. Be specific! Don't ask "can someone send me the code to create an application that does 'X'. Pinpoint exactly what it is you need help with.
   
   
3. Keep the subject line brief, but descriptive. eg "File Serialization problem"
   
   
4. Keep the question as brief as possible. If you have to include code, include the smallest snippet of code you can.
   
   
5. Be careful when including code that you haven't made a typo. Typing mistakes can become the focal point instead of the actual question you asked.
   
   
6. Do not remove or empty a message if others have replied. Keep the thread intact and available for others to search and read. If your problem was answered then edit your message and add "[Solved]" to the subject line of the original post, and cast an approval vote to the one or several answers that really helped you.
   
   
7. If you are posting source code with your question, place it inside <pre></pre> tags. We advise you also check the "Encode "<" (and other HTML) characters when pasting" checkbox before pasting anything inside the PRE block, and make sure "Use HTML in this post" check box is checked.
   
   
8. Be courteous and DON'T SHOUT. Everyone here helps because they enjoy helping others, not because it's their job.
   
   
9. Please do not post links to your question into an unrelated forum such as the lounge. It will be deleted. Likewise, do not post the same question in more than one forum.
   
   
10. Do not be abusive, offensive, inappropriate or harass anyone on the boards. Doing so will get you kicked off and banned. Play nice.
    
    
11. If you have a school or university assignment, assume that your teacher or lecturer is also reading these forums.
    
    
12. No advertising or soliciting.
    
    
13. We reserve the right to move your posts to a more appropriate forum or to delete anything deemed inappropriate or illegal.

Properties.Settings mySettings = new Properties.Settings();

private void SettingsForm_Load(object sender, EventArgs e)
{
    this.propertyGrid1.SelectedObject = mySettings;
}

// Should we always have a separate _userManager injected?
var userId = await _userManager.GetUserIdAsync(user);

// Or would this also work, but some may not like the multiple chaining?
var userId = await _signInManager.UserManager.GetUserIdAsync(user);

An unhandled exception of type 'System.InvalidCastException' occurred in System.Data.dll
Additional information:

Dim len As Long = rd.GetBytes(0, 0, Nothing, 0, 0)
Dim array(CInt(len)) As Byte
rd.GetBytes(0, 0, array, 0, CInt(len))
pic = New PictureBox

Dim ms As New System.IO.MemoryStream(array)
Dim bitmap As New System.Drawing.Bitmap(ms)
pic.BackgroundImage = bitmap

Imports System.Data.OleDb
Public Class Form1
    Dim con As OleDbConnection
    Dim cmd As OleDbCommand
    Dim rd As OleDbDataReader

    Private WithEvents pic As New PictureBox

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        'Dim con As OleDbConnection
        'Dim cmd As OleDbCommand
        'Dim rd As OleDbDataReader

        con = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\database.accdb;")
        con.Open()

        cmd = New OleDbCommand("select * from MyTable", con)
        rd = cmd.ExecuteReader
        MsgBox("connected")

        con.Close()
        MsgBox("disconnected")
    End Sub

    Sub LoadData()
        con = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\database.accdb;")
        con.Open()
        cmd = New OleDbCommand("select * from MyTable", con)
        rd = cmd.ExecuteReader
        While rd.Read
            Dim len As Long = rd.GetBytes(0, 0, Nothing, 0, 0)
            Dim array(CInt(len)) As Byte
            rd.GetBytes(0, 0, array, 0, CInt(len))
            pic = New PictureBox

            Dim ms As New System.IO.MemoryStream(array)
            Dim bitmap As New System.Drawing.Bitmap(ms)
            pic.BackgroundImage = bitmap

            FlowLayoutPanel1.Controls.Add(pic)

        End While
        rd.Close()
        con.Close()
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        LoadData()
    End Sub
End Class