Try this
Dim viewPerson As DataView
Dim da As New OleDbDataAdapter
Dim tbl as New DataTable
da = New OleDbDataAdapter("SELECT Last Name, Age, Nationality FROM PersonInfos", con)
da.Fill(tbl)
viewPerson = New DataView(tbl)
سؤال
I am new to VB.Net and Window Forms. I am doing a filtering on a table, so that the words entered in searching machine can be used to show the infos(row) that are relevant only. I will explain my situation after I showed my codes:
Private Sub findTextBox2_TextChanged(sender As Object, e As EventArgs) Handles findTextBox2.TextChanged
Dim viewPerson As DataView
viewPerson = New DataView(Data.ds.Tables("PersonInfos"))
If Not String.IsNullOrEmpty(Me.findTextBox2.Text) Then
Dim person As String = FilterListBox("PersonInfos", Me.findTextBox2.Text)
viewPerson.RowFilter = "ID in (" & person & ") "
Else
viewPerson.RowFilter = ""
End If
DataGridView2.DataSource = viewPerson
con.Close()
End Sub
After this filtering, all the infos (all the columns) frm the table "PersonInfos" will be showed. If I just want the column of "Last Name", "Age" and "Nationality" from the table (in a .mdb file) be shown only. What should i include in the codes.
I have search online and didn't manage to find a solution to my problem. Any help will be much appreciated. Thank you in advance.
This is what inside the method FilterListBox:
Private Function FilterListBox(ByVal TableName As String, ByVal tbText As String) As String
Dim IDs As String = String.Empty
If tbText.Contains("*") Then
If Not tbText.StartsWith("*") Then
tbText = "^" + tbText
End If
tbText = tbText.Replace("*", ".*")
If tbText.Contains("?") Then
tbText = tbText.Replace("?", ".")
End If
For Each row As DataRow In data.ds.Tables(TableName).Rows
If System.Text.RegularExpressions.Regex.IsMatch(row.Item("Name"), tbText, System.Text.RegularExpressions.RegexOptions.IgnoreCase) Then
If IDs <> "" Then IDs &= ","
IDs &= row.Item("ID")
Dim dfd As String = row.Item("Name").ToString()
Dim a As Boolean = System.Text.RegularExpressions.Regex.IsMatch(row.Item("Name"), tbText, System.Text.RegularExpressions.RegexOptions.IgnoreCase)
End If
Next
Else
For Each row As DataRow In data.ds.Tables(TableName).Rows
If row.Item("Name").ToString.StartsWith(tbText, StringComparison.CurrentCultureIgnoreCase) Then
If IDs <> "" Then IDs &= ","
IDs &= row.Item("ID")
Dim dfd As String = row.Item("Name").ToString()
Dim a As Boolean = System.Text.RegularExpressions.Regex.IsMatch(row.Item("Name"), tbText, System.Text.RegularExpressions.RegexOptions.IgnoreCase)
End If
Next
End If
If IDs <> "" Then
Return IDs
Else
Return "1=2"
End If
End Function
المحلول
Try this
Dim viewPerson As DataView
Dim da As New OleDbDataAdapter
Dim tbl as New DataTable
da = New OleDbDataAdapter("SELECT Last Name, Age, Nationality FROM PersonInfos", con)
da.Fill(tbl)
viewPerson = New DataView(tbl)