Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>If you want to create an assignment expression, simply create an expression that invokes a generic assignment routine. The class below provides a nice extension method that will convert any field access expression into a field assignment expression:</p> <pre><code>using System; using System.Linq.Expressions; using System.Reflection; namespace Ethica.Expressions { public static class ExpressionExtenstions { private class AssignmentHelper&lt;T&gt; { private static void SetValue(ref T target, T value) { target = value; } internal static MethodInfo MethodInfoSetValue = typeof(AssignmentHelper&lt;T&gt;).GetMethod("SetValue", BindingFlags.NonPublic | BindingFlags.Static); } public static Expression&lt;Action&lt;TInstance, TProp&gt;&gt; ToFieldAssignExpression&lt;TInstance, TProp&gt; ( this Expression&lt;Func&lt;TInstance, TProp&gt;&gt; fieldGetter ) { if (fieldGetter == null) throw new ArgumentNullException("fieldGetter"); if(fieldGetter.Parameters.Count != 1 || !(fieldGetter.Body is MemberExpression)) throw new ArgumentException ("Input expression must be a single parameter field getter, e.g. g =&gt; g._fieldToSet or function(g) g._fieldToSet"); ParameterExpression[] parms = new ParameterExpression[] { fieldGetter.Parameters[0], Expression.Parameter(typeof(TProp), "value")}; Expression body = Expression.Call(AssignmentHelper&lt;TProp&gt;.MethodInfoSetValue, new Expression[] { fieldGetter.Body, parms[1] }); return Expression.Lambda&lt;Action&lt;TInstance, TProp&gt;&gt;(body, parms); } public static Action&lt;TInstance, TProp&gt; ToFieldAssignment&lt;TInstance, TProp&gt; ( this Expression&lt;Func&lt;TInstance, TProp&gt;&gt; fieldGetter ) { return fieldGetter.ToFieldAssignExpression().Compile(); } } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POExpression.Dynamic and Operators.Assign?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USMark
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload