AddWithValue MySqlType.Decimal
Hallo,
ich komme leider nicht weiter. Arbeite mit vs2019 und vb. Habe eine cascadierende DropDownList erstellt (Land, Bundesland, Region). Bei Land, wo ich kein AddWithValue verwenden muss, funktioniert es tadellos. Bei Bundesland, wo ich AddWithValue verwenden muss, krieg ich es nicht gebacken. Alle id's sind als Integer definiert. Der relevante Code:
Protected Sub idLand_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
DropDownBundesland.Items.Clear()
DropDownBundesland.Items.Add(New ListItem("--Select Country--", ""))
DropDownRegion.Items.Clear()
DropDownRegion.Items.Add(New ListItem("--Select City--", ""))
DropDownBundesland.AppendDataBoundItems = True
Dim strConnString As [String] = ConfigurationManager _
.ConnectionStrings("conString").ConnectionString
Dim strQuery As [String] = "Select Bundesland, idBundesland, idLand from Campingplatz ORDER BY Bundesland ASC where idLand = @LandID Group BY Bundesland"
Dim con As New MySqlConnection(strConnString)
Dim cmd As New MySqlCommand()
cmd.Parameters.AddWithValue("@LandID", MySqlDbType.Decimal).Value = DropDownLand.SelectedItem.Value
cmd.CommandType = CommandType.Text
cmd.CommandText = strQuery
cmd.Connection = con
Try
con.Open()
DropDownBundesland.DataSource = cmd.ExecuteReader()
DropDownBundesland.DataTextField = "Bundesland"
DropDownBundesland.DataValueField = "idBundesland"
DropDownBundesland.DataBind()
If DropDownBundesland.Items.Count > 1 Then
DropDownBundesland.Enabled = True
Else
DropDownBundesland.Enabled = False
DropDownRegion.Enabled = False
End If
Catch ex As Exception
'Throw ex
Finally
con.Close()
con.Dispose()
End Try
End Sub
Bitte um Hilfe!
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AddWithValue MySqlType.Decimal
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October 18, 2021 07:55AM
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November 05, 2021 01:31AM
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