This is the code
public ActionResult Perform(CustomActionContext context, CustomActionCancelEventArgs evt)
{
ActionResult actionResult = new ActionResult();
if (context.Items == null || context.Items.Count == 0)
{
evt.Cancel = true;
// you may construct a simple message for popup message or html text if message will be shown as inline
evt.Message = "There is no item to validate.";
return actionResult;
}
SPListItem item = null;
StringBuilder itemIDs = new StringBuilder();
IEnumerator enumerator = context.Items.GetEnumerator();
while (enumerator.MoveNext())
{
item = enumerator.Current as SPListItem;
if (item != null)
{
itemIDs.Append(item["ID"] + ";");
}
}
actionResult.RawData = itemIDs;
return actionResult;
}
This is the custom action
<CustomActions>
<ContextMenu />
<Toolbar>
<ActionItem ID="SelectID1" Text="SelectID/Delete">
<Action Name="Action1" Type="Custom" OpenURL="CurrentWindow" class="MyCompany.DevStudio.pleCustomActionEx, MyCompany.DevStudio, Version=1.0.0.0, Culture=neutral, PublicKeyToken=451cac61f7ec4225" />
<Action Name="Start" Type="GoToURL" URL="http://sp22:63/default.aspx" OpenURL="NewWindow">
<Parameter Name="OrderID" Source="ResultFromAction" SourceName="Action1.RawData" />
</Action>
</ActionItem>
</Toolbar>
</CustomActions>
and teh list is a custom list with no extra fields.
Please let me know how it goes.