Question

I have a following ListView item template, in which I am trying to bind integer value to Checked property of CheckBox.

IsUploaded value contains only 0 and 1…

<asp:ListView ID="trustListView" runat="server">
    <ItemTemplate>
        <asp:CheckBox ID="isUploadedCheckBox" runat="server"
            Checked='<%# Bind("IsUploaded") %>' />
    </ItemTemplate>
</asp:ListView>

But ASP.NET complains that

Exception Details: System.InvalidCastException: Sepcified cast is not valid

Even though following code using DataBinder.Eval() works,

I need to have a 2-way binding, thus need to use Bind().

<asp:CheckBox ID="isUploadedCheckBox2" runat="server"
    Checked='<%# Convert.ToBoolean(
        DataBinder.Eval(Container.DataItem, "IsUploaded"))) %>' />

How can I convert 0’s and 1’s to boolean using Bind()?

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[ANSWER]
I have extended auto-generated type through partial class by adding a new property mentioned in the answer by Justin

Answer 1

If you’re willing to change the class, add a property on the class that’s a boolean

public bool IsUploadedBoolean
{
   get { return IsUploaded != 0; }
   set { IsUploaded = value ? 1 : 0; }
}

If not, you may have success with a TypeConverter:

1. Create a custom TypeConverter which will handle 0 and 1 to boolean conversions
2. Stick the TypeConverterAttribute on the IsUploaded property to direct .NET to your custom typeconverter.