Toggle Debugging on/off for a Custom Code Web Part in SharePoint

C#
When I render my custom coded SharePoint Web Part, it helps to display extra information to assist me in troubleshooting. I can do this by constructing my web part like this...

...
using System.Web.UI.WebControls.WebParts;
...
public class MyCustomWebPart : WebPart
{
  protected override void CreateChildControls()
  {
    string paramOne = "One";
    this.Controls.Add(new LiteralControl("paramOne=" + paramOne + <br/>));
  }
}

So that my custom Web Part displays "paramOne=One"  Useful for debugging when I want know the value of internal parameters in code.

However, I don't want my user's to see my debugging information. I only want to turn it on in my local browser instance. I do this by adding to the Query String "?debug=true"  So on the end of my URL I append the Query String and update my Controls.Add statement with the following code.

bool.TryParse(Page.Request.QueryString["debug"], out debugOn);
if (debugOn) this.Controls.Add(new LiteralControl("paramOne=" + paramOne));


SharePoint Set the Value of a Yes/No Field in Code

C#


// Where "item" is of type SPItem
// how to read
bool result = Convert.ToBoolean(item["YesNoField"]);

// how to write
item["YesNoField"] = true;
item.Update();


Available Headers in the SPEmailMessage Object

It couldn't find a complete list of email headers for Microsoft.SharePoint.Utilities.SPEmailHeader, so I've compiled one here;

Here's a sample usage that will return the raw email address of the sender...
// emailMessage is of the type SPEmailMessage
string EmailAddress = emailMessage.Headers["Return-Path"].ToString();
// will return "sender@domain.com"

string EmailAddress = emailMessage.Headers["From"].ToString();
// will return "Sender Contact Name <sender@domain.com>"

Ordinal	Name	Example
1	x-reciever	"recipient@domain.com"
2	Received	"from IncomingMailServer([IP])..."
3	Received	"from IncomingMailServer([IP])..."
4	From	"Sender Contact Name <sender@domain.com>"
5	To	"Recipient Contact Name <recipient@domain.com>"
6	Subject	"Subject Text"
7	Thread-Topic	"Topic Text"
8	Thread-Index	guid
9	Date	ddd, dd mmm yyyyy hh:mm:ss +0000
10	Message-ID	"UniqueId@IncomingMailServer"
11	Accept-Language	"en-US"
12	Content-Language	"en-US"
13	X-MS-Has-Attach	"yes" or ""
14	X-MS-TNEF-Correlator	""
15	x-originating-ip	"[IP]"
16	Content-Type	??
17	MIME-Version	"1.0"
18	Return-Path	"sender@domain.com

Here's a handy way to parse out the date...
DateTime sent = DateTime.Parse(emailMessage.Headers["Date"]);