特定の列のすべてのデータを 1 つのコンボボックスに表示したいのですが、コードは列の最後のデータを表示しているだけです。ここで使用しているコードは次のとおりです。
Dim connectionstring As String = "Data Source=localhost\SQLEXPRESS;InitialCatalog=Enginee;Integrated Security=True"
Try
Dim connection As New SqlClient.SqlConnection(ConnectionString)
Dim sqlquery As String
connection.Open()
MessageBox.Show("Open")
sqlquery = " Select PROJECT.PROJECT_CODE,PROJECT.PROJECT_NAME From PROJECT INNER JOIN ENGINEERS on ENGINEERS.ENGINEER_ID = ENGINEERS.ENGINEER_ID where ENGINEERS.FNAME = '" & Sign_In.TextBox1.Text & "' "
Dim selectcommand As New SqlClient.SqlCommand(sqlquery, connection)
Dim reader As SqlClient.SqlDataReader = selectcommand.ExecuteReader
Dim test As Boolean = reader.Read
While test = True
ComboBox1.Text = reader(0)
TextBox1.Text = reader(1)
test = reader.Read
End While
Catch ex As Exception
MessageBox.Show("Failed")
End Try