jokerxp888
asked on
ListBox problem
i have 2 table
table1 : categoryID,CategoryName,De
table2: subCategoryID,SubCateogryN
link by CategoryID
i have 2 listbox
listbox1 : display all categoryName
listbox2: display subCategoryName base on categoryName selected at the listbox1
my code :
Private ds As DataSet = New DataSet
Public Sub getCategory(ByVal ds As DataSet)
Dim strSql As String = "select * from Category"
Dim da As OleDbDataAdapter = New OleDbDataAdapter(strSql, DBConn)
da.Fill(ds, "Category")
End Sub
Public Sub getSubCategory(ByVal ds As DataSet)
Dim strSql As String = "select * from SubCategory"
Dim da As OleDbDataAdapter = New OleDbDataAdapter(strSql, DBConn)
da.Fill(ds, "SubCategory")
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
getCategory(ds)
getSubCategory(ds)
ListBox1.DataSource = ds.Tables("category")
ListBox1.DisplayMember = ds.Tables("category").Colu
ListBox1.ValueMember = ds.Tables("category").Colu
End Sub
any can help me ?
table1 : categoryID,CategoryName,De
table2: subCategoryID,SubCateogryN
link by CategoryID
i have 2 listbox
listbox1 : display all categoryName
listbox2: display subCategoryName base on categoryName selected at the listbox1
my code :
Private ds As DataSet = New DataSet
Public Sub getCategory(ByVal ds As DataSet)
Dim strSql As String = "select * from Category"
Dim da As OleDbDataAdapter = New OleDbDataAdapter(strSql, DBConn)
da.Fill(ds, "Category")
End Sub
Public Sub getSubCategory(ByVal ds As DataSet)
Dim strSql As String = "select * from SubCategory"
Dim da As OleDbDataAdapter = New OleDbDataAdapter(strSql, DBConn)
da.Fill(ds, "SubCategory")
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
getCategory(ds)
getSubCategory(ds)
ListBox1.DataSource = ds.Tables("category")
ListBox1.DisplayMember = ds.Tables("category").Colu
ListBox1.ValueMember = ds.Tables("category").Colu
End Sub
any can help me ?
ptakja
What's the problem?
ASKER
i want to make it
listbox1 : display all categoryName
listbox2: display subCategoryName base on categoryName selected at the listbox1
listbox1 : display all categoryName
listbox2: display subCategoryName base on categoryName selected at the listbox1
ASKER
i have error at
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
ListBox2.DataSource = ds.Tables("subCategory").S
ListBox2.DisplayMember = ds.Tables("subCategory").C
ListBox2.ValueMember = ds.Tables("subCategory").C
Catch err As Exception
MsgBox(err.ToString)
End Try
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
ListBox2.DataSource = ds.Tables("subCategory").S
ListBox2.DisplayMember = ds.Tables("subCategory").C
ListBox2.ValueMember = ds.Tables("subCategory").C
Catch err As Exception
MsgBox(err.ToString)
End Try
End Sub
What's the error you get?
ASKER CERTIFIED SOLUTION
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ptakja took a good point.
You can use the default view of the datatable
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
dim dv as Data.DataView = ds.Tables("subCategory").D
dv.Sort = "cat_id"
dv.RowFilter = "1"
ListBox2.DataSource = dv
ListBox2.DisplayMember = ds.Tables("subCategory").C
ListBox2.ValueMember = ds.Tables("subCategory").C
Catch err As Exception
MsgBox(err.ToString)
End Try
End Sub
You can use the default view of the datatable
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
dim dv as Data.DataView = ds.Tables("subCategory").D
dv.Sort = "cat_id"
dv.RowFilter = "1"
ListBox2.DataSource = dv
ListBox2.DisplayMember = ds.Tables("subCategory").C
ListBox2.ValueMember = ds.Tables("subCategory").C
Catch err As Exception
MsgBox(err.ToString)
End Try
End Sub
I would say split between ptakja & wguerram.