显示与 CheckedListBox 项相关的数据
Display associated data with CheckedListBox Items
I have a code where it displays items from MS Access database to a
checkedlistbox
:
Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim con As New OleDb.OleDbConnection
con.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\rose&mike\Desktop\DbSysDel3\salondbaccess.accdb"
Dim cmd As OleDbCommand
Dim sql As String = "SELECT Service_Name FROM [Service_Types]"
con.Open()
cmd = New OleDb.OleDbCommand(sql, con)
Dim dr As OleDbDataReader = cmd.ExecuteReader
If dr.HasRows Then
While dr.Read
chcklstbx1.Items.Add(dr(0))
End While
End If
con.Close()
End Sub
我需要做的是在勾选某项时显示关联的Service_Fee并将其转换为String
。非常感谢任何建议。
Dim selec As String
Dim con As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\rose&mike\Desktop\DbSysDel3\salondbaccess.accdb")
Dim dt2 As New DataTable
selec = ""
con.Open()
For Each incheck In chcklstbx1.CheckedIndices
Dim valName As String
valName = chcklstbx1.Items.Item(incheck).ToString
Dim sqlstr2 As String = "SELECT Service_Fee FROM Service_Types WHERE [Service_Name] = '" & valName & "'"
Dim cmd As New OleDbCommand(sqlstr2, con)
Dim sum As Double = 0
Dim rdr As OleDbDataReader = cmd.ExecuteReader
If rdr.HasRows Then
While rdr.Read
selec += "P" + rdr("Service_Fee").ToString & ControlChars.NewLine
End While
End If
lblFees.Text = selec
rdr.Close()
Next
con.Close()
I have a code where it displays items from MS Access database to a
checkedlistbox
:
Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim con As New OleDb.OleDbConnection
con.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\rose&mike\Desktop\DbSysDel3\salondbaccess.accdb"
Dim cmd As OleDbCommand
Dim sql As String = "SELECT Service_Name FROM [Service_Types]"
con.Open()
cmd = New OleDb.OleDbCommand(sql, con)
Dim dr As OleDbDataReader = cmd.ExecuteReader
If dr.HasRows Then
While dr.Read
chcklstbx1.Items.Add(dr(0))
End While
End If
con.Close()
End Sub
我需要做的是在勾选某项时显示关联的Service_Fee并将其转换为String
。非常感谢任何建议。
Dim selec As String
Dim con As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\rose&mike\Desktop\DbSysDel3\salondbaccess.accdb")
Dim dt2 As New DataTable
selec = ""
con.Open()
For Each incheck In chcklstbx1.CheckedIndices
Dim valName As String
valName = chcklstbx1.Items.Item(incheck).ToString
Dim sqlstr2 As String = "SELECT Service_Fee FROM Service_Types WHERE [Service_Name] = '" & valName & "'"
Dim cmd As New OleDbCommand(sqlstr2, con)
Dim sum As Double = 0
Dim rdr As OleDbDataReader = cmd.ExecuteReader
If rdr.HasRows Then
While rdr.Read
selec += "P" + rdr("Service_Fee").ToString & ControlChars.NewLine
End While
End If
lblFees.Text = selec
rdr.Close()
Next
con.Close()