Created
October 2, 2013 07:16
-
-
Save pieterdv/6790087 to your computer and use it in GitHub Desktop.
convert list of (string) fields to a linq to sql statement
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Func<Tin, Tout> CreateSelectStatement<Tin, Tout>(string fields) | |
{ | |
var xParameter = Expression.Parameter(typeof(Tout), "o"); | |
var xNew = Expression.New(typeof(Tout)); | |
var bindings = fields.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries).Select(o => o.Trim()).Select(o => | |
{ | |
var mi = typeof(Tout).GetProperty(o); | |
var xOriginal = Expression.Property(xParameter, mi); | |
return Expression.Bind(mi, xOriginal); | |
}); | |
var xInit = Expression.MemberInit(xNew, bindings); | |
var lambda = Expression.Lambda<Func<Tin, Tout>>(xInit, xParameter); | |
return lambda.Compile(); | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment