Gokul's Blog

Exists Operator

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If you have ever tried to check wheteher a message context property exists in the message,

We could have tried something like  if(MyMsg(MIME.Filename) == null)  & failed as it throws an Exception(MissingPropertyException).

This is where the Exists operator comes in to rescue.

  • MIME.FileName is the Message Context property
  • MyMsg is the Xlang Message

Syntax:

if (MIME.FileName exists MyMsg)
{
//Do Something
}

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, “Courier New”, courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

The above is a code snippet which shows how the exists operator can be used in an orchestration Expression shape. 
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