C# convert viewstate to bool array

How I can convet viewstate to bool array

private bool[] clientCollapse
{
    get { return Convert.ToBoolean(ViewState["Collapse"]); }
    set { ViewState["Collapse"] = value; }
}

Any idea开发者_开发知识库s???

private bool[] clientCollapse
{
    get { return (bool[])ViewState["Collapse"]; }
    set { ViewState["Collapse"] = value; }
}

if will work if you set those values only using this propery, otherwise you can but there other type and cast will not work

BTW common naming convention for C# requires property names to start with capital: ClientCollapse

You can do this:

private bool[] clientCollapse
{
    get { return (bool[])ViewState["Collapse"] ?? new bool[0]; }
    set { ViewState["Collapse"] = value; }
}

private bool [] clientCollapse
{
    get { return (ViewState["Collapse"] as bool[]); }
    set { ViewState["Collapse"]; }
}

You may use extension methods so that you use it ViewState<byte[]>.GetTypedData(key):

public static class ViewStateExtensions
    {

         public static T GetTypedData<T>(this StateBag bag, string key)
         {
             return (T) bag[key];
         }

         public static void SetTypedData<T>(this StateBag bag, string key, T value)
         {
             bag[key] = value;
         }

    }

try changing your getter to:

get { return ViewState["Collapse"] as bool[]; }

this will return null if it's not set.

You should be using casts to do this:

private bool [] clientCollapse
{
    get { return (bool[]) ViewState["Collapse"]); }
    set { ViewState["Collapse"] = value; }
}

ASP.NET's serialization of view state will do the rest for you.