Bunch's Blog

# re: 2-Way Binding with CascadingDropDown

Do you have the code in C# I get a bit anoyed sometimes with VB.

Thanks,

Javier

# re: 2-Way Binding with CascadingDropDown

THANKS

SAVED ME A LOT OF TROUBLE

# re: 2-Way Binding with CascadingDropDown

It's quirky, but this saved my butt. The only issue I had was a boolean value in my EditTemplate.

protected void DetailsView1_ItemUpdating(object sender, DetailsViewUpdateEventArgs e) {
var strTemp = string.Empty;

foreach (var strKey in e.NewValues.Keys) {
if (!(e.NewValues[strKey] is string))
//skip anything we can't cast to a string
continue;

strTemp = (string)e.NewValues[strKey];

if (strTemp.Contains(":::"))
e.NewValues[strKey] = cleanBindValue(strTemp);
}
}

private object cleanBindValue(string DirtyValue) {
var delim = ":::".ToCharArray();

return DirtyValue.Split(delim)[0];
}

# re: 2-Way Binding with CascadingDropDown

I realize this is kinda old, but I had to thank you for this. Saved me ton of headache!!!!! Thank you, thank you, thank you. I ended up creating a custom control inheriting from CascadingDropDown and adding a bindable property, clean up the selected value there and setting the property on load.

using System;
using System.ComponentModel;
using System.Web.UI;
using AjaxControlToolkit;

namespace CustomServerControls {
[ToolboxData("<{0}:SmartCascadingDropDown runat=server></{0}:smartCascadingDropDown>")]
public class SmartCascadingDropDown : CascadingDropDown {

private char[] _seperator = ":::".ToCharArray();

private string _DropDownSelectedValue;

[Bindable(BindableSupport.Yes)]
[Category("Data")]
[Browsable(true)]
[EditorBrowsable(EditorBrowsableState.Always)]
public string DropDownSelectedValue {
get {
return _DropDownSelectedValue;
}
set {
_DropDownSelectedValue = value;
}
}

protected override void OnLoad(EventArgs e) {
base.OnLoad(e);

_DropDownSelectedValue = cleanUpValue(base.SelectedValue);
}

private string cleanUpValue(string inputString) {
var outputString = inputString.Split(_seperator)[0];

return outputString;
}
}
}

# re: 2-Way Binding with CascadingDropDown

Forgot to add, set properties for control as:

SelectedValue='<%# Eval("FieldID") >'
DropDownSelectedValue='<%# Bind("FieldID") %>'

I'm sure I could have overriden SelectedValue, but I prefer not to risk breaking any existing functionality so I can use the derived CascadingDropDown like a normal one if I need to.