Exception handling in WebForms
- by user999379
I have a webform with a formview
<asp:FormView ID="formViewBrouwers" runat="server" AllowPaging="True"
DataKeyNames="BrouwerNr" DataSourceID="brouwerDataSource"
onitemupdated="formViewBrouwers_ItemUpdated"
onitemupdating="formViewBrouwers_ItemUpdating"
oniteminserted="formViewBrouwers_ItemInserted"
oniteminserting="formViewBrouwers_ItemInserting">
<EditItemTemplate>
BrouwerNr:
<asp:Label ID="BrouwerNrLabel1" runat="server"
Text='<%# Eval("BrouwerNr") %>' />
<br />
BrNaam:
<asp:TextBox ID="BrNaamTextBox" runat="server" Text='<%# Bind("BrNaam") %>' />
<br />
Adres:
<asp:TextBox ID="AdresTextBox" runat="server" Text='<%# Bind("Adres") %>' />
<br />
Postcode:
<asp:TextBox ID="PostcodeTextBox" runat="server"
Text='<%# Bind("Postcode") %>' />
<br />
Gemeente:
<asp:TextBox ID="GemeenteTextBox" runat="server"
Text='<%# Bind("Gemeente") %>' />
<br />
Omzet:
<asp:TextBox ID="OmzetTextBox" runat="server" Text='<%# Bind("Omzet") %>' />
<br />
Status:
<asp:TextBox ID="StatusTextBox" runat="server" Text='<%# Bind("Status") %>' />
<br />
<asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True"
CommandName="Update" Text="Update" />
<asp:LinkButton ID="UpdateCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</EditItemTemplate>
<InsertItemTemplate>
BrNaam:
<asp:TextBox ID="BrNaamTextBox" runat="server" Text='<%# Bind("BrNaam") %>' />
<br />
Adres:
<asp:TextBox ID="AdresTextBox" runat="server" Text='<%# Bind("Adres") %>' />
<br />
Postcode:
<asp:TextBox ID="PostcodeTextBox" runat="server"
Text='<%# Bind("Postcode") %>' />
<br />
Gemeente:
<asp:TextBox ID="GemeenteTextBox" runat="server"
Text='<%# Bind("Gemeente") %>' />
<br />
Omzet:
<asp:TextBox ID="OmzetTextBox" runat="server" Text='<%# Bind("Omzet") %>' />
<br />
Status:
<asp:TextBox ID="StatusTextBox" runat="server" Text='<%# Bind("Status") %>' />
<br />
<asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True"
CommandName="Insert" Text="Insert" />
<asp:LinkButton ID="InsertCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</InsertItemTemplate>
<ItemTemplate>
BrouwerNr:
<asp:Label ID="BrouwerNrLabel" runat="server" Text='<%# Eval("BrouwerNr") %>' />
<br />
BrNaam:
<asp:Label ID="BrNaamLabel" runat="server" Text='<%# Bind("BrNaam") %>' />
<br />
Adres:
<asp:Label ID="AdresLabel" runat="server" Text='<%# Bind("Adres") %>' />
<br />
Postcode:
<asp:Label ID="PostcodeLabel" runat="server" Text='<%# Bind("Postcode") %>' />
<br />
Gemeente:
<asp:Label ID="GemeenteLabel" runat="server" Text='<%# Bind("Gemeente") %>' />
<br />
Omzet:
<asp:Label ID="OmzetLabel" runat="server" Text='<%# Bind("Omzet") %>' />
<br />
Status:
<asp:Label ID="StatusLabel" runat="server" Text='<%# Bind("Status") %>' />
<br />
<asp:LinkButton ID="EditButton" runat="server" CausesValidation="False"
CommandName="Edit" Text="Edit" />
<asp:LinkButton ID="DeleteButton" runat="server" CausesValidation="False"
CommandName="Delete" Text="Delete" />
<asp:LinkButton ID="NewButton" runat="server" CausesValidation="False"
CommandName="New" Text="New" />
</ItemTemplate>
<PagerSettings Mode="NextPreviousFirstLast" />
</asp:FormView>
In my property Postcode I check the value like this:
private Int16 postcodeValue;
public Int16 Postcode
{
get
{
return postcodeValue;
}
set
{
if (value < 1000 || value > 9999)
{
throw new Exception("Postcode moet tussen 1000 en 9999 liggen");
}
else
{
postcodeValue = value;
}
}
}
How can I handle the exception I threw? If there is an exception I want a label to appear with the following exception?
