How To Save Value Across Postbacks For A Composite Control Without Using Viewstate
Oct 29, 2010
I have a composite control that has a couple of private fields that reference values in the cache and these private fields are called during the constructor method. Since a string key is used to identify the value in the cache, I must have a way of storing that string key in such a way that it is available at the time the control is instantiated, and I have to be able to reference it on postbacks without it changing.
In addition, this key is generated the first time the control is loaded, but it should not be changed again after that first time.
How can I accomplish this?
I have already tried saving it to viewstate, but that doesn't work because viewstate is not yet available at the time the control is instantiated.
I have tried using a private field and then checking against Page.IsPostback in the constructor and if it isn't postback, I assign a value to the private field, but on subsequent postbacks it looses it's value, and I can't reassign it in the Page.IsPostBack again because it is an autogenerated GUID.
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Mar 5, 2010
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[Code]....
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[Code].....
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[Code]....
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public class CmdTest : CompositeControl
{
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get
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<Utils:CmdTest ID="CmdTest1" runat="server" oninit="CmdTest1_Init" />
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//..
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