Override SharePoint SaveButton to function as Save As Draft button:

There was a requirement for an application to save a list item as draft and then submit the list item as final once all the required information is available. SharePoint save button can be overridden to start a custom workflow if required. Remember save as draft and save Buttons are different.



<%@ Register TagPrefix="WebControl" Assembly="XXXXXX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c2b3ca69d93d7c67" namespace="XXXXXX"%>

In the custom list form
<wssuc:ToolBar CssClass="ms-formtoolbar" id="toolBarTbltop" RightButtonSeparator=" " runat="server">
<Template_RightButtons>
<WebControl:SubmitButton ID="SubmitButton1" Text="Submit" WorkflowKey="Server Request" runat="server" />
<WebControl:SaveDraftButton ID="SaveDraftButton1" text="Save Draft" runat="server"/>
<SharePoint:GoBackButton runat="server"/>
</Template_RightButtons>
</wssuc:ToolBar>

Code for Save as Draft button:
namespace XXXXXXX
{
[SharePointPermission(SecurityAction.InheritanceDemand, ObjectModel = true), AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal), SharePointPermission(SecurityAction.LinkDemand, ObjectModel = true), AspNetHostingPermission(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class SaveDraftButton : SaveButton
{
protected override bool SaveItem()
{
bool setPermissions = ListItem.Name == null;
bool success = base.SaveItem();
if (setPermissions)
{
EventMethods.SetItemInitialPermissions(ListItem);
}
return success;
}

[SharePointPermission(SecurityAction.Demand, ObjectModel = true)]
protected override bool OnBubbleEvent(object source, EventArgs e)
{
bool flag;
string redirectUrl;
base.OnBubbleEvent(source, e);
flag = this.SaveItem();
redirectUrl = base.RedirectUrl;
SPUtility.Redirect(redirectUrl, SPRedirectFlags.UseSource, this.Context);
return flag;
}
}
}