Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>A few years late here, but here's my solution (you can choose whether to include boolean). Solves for the Nullable case. XUnit test included</p> <pre><code>/// &lt;summary&gt; /// Determines if a type is numeric. Nullable numeric types are considered numeric. /// &lt;/summary&gt; /// &lt;remarks&gt; /// Boolean is not considered numeric. /// &lt;/remarks&gt; public static bool IsNumericType( Type type ) { if (type == null) { return false; } switch (Type.GetTypeCode(type)) { case TypeCode.Byte: case TypeCode.Decimal: case TypeCode.Double: case TypeCode.Int16: case TypeCode.Int32: case TypeCode.Int64: case TypeCode.SByte: case TypeCode.Single: case TypeCode.UInt16: case TypeCode.UInt32: case TypeCode.UInt64: return true; case TypeCode.Object: if ( type.IsGenericType &amp;&amp; type.GetGenericTypeDefinition() == typeof(Nullable&lt;&gt;)) { return IsNumericType(Nullable.GetUnderlyingType(type)); } return false; } return false; } /// &lt;summary&gt; /// Tests the IsNumericType method. /// &lt;/summary&gt; [Fact] public void IsNumericTypeTest() { // Non-numeric types Assert.False(TypeHelper.IsNumericType(null)); Assert.False(TypeHelper.IsNumericType(typeof(object))); Assert.False(TypeHelper.IsNumericType(typeof(DBNull))); Assert.False(TypeHelper.IsNumericType(typeof(bool))); Assert.False(TypeHelper.IsNumericType(typeof(char))); Assert.False(TypeHelper.IsNumericType(typeof(DateTime))); Assert.False(TypeHelper.IsNumericType(typeof(string))); // Arrays of numeric and non-numeric types Assert.False(TypeHelper.IsNumericType(typeof(object[]))); Assert.False(TypeHelper.IsNumericType(typeof(DBNull[]))); Assert.False(TypeHelper.IsNumericType(typeof(bool[]))); Assert.False(TypeHelper.IsNumericType(typeof(char[]))); Assert.False(TypeHelper.IsNumericType(typeof(DateTime[]))); Assert.False(TypeHelper.IsNumericType(typeof(string[]))); Assert.False(TypeHelper.IsNumericType(typeof(byte[]))); Assert.False(TypeHelper.IsNumericType(typeof(decimal[]))); Assert.False(TypeHelper.IsNumericType(typeof(double[]))); Assert.False(TypeHelper.IsNumericType(typeof(short[]))); Assert.False(TypeHelper.IsNumericType(typeof(int[]))); Assert.False(TypeHelper.IsNumericType(typeof(long[]))); Assert.False(TypeHelper.IsNumericType(typeof(sbyte[]))); Assert.False(TypeHelper.IsNumericType(typeof(float[]))); Assert.False(TypeHelper.IsNumericType(typeof(ushort[]))); Assert.False(TypeHelper.IsNumericType(typeof(uint[]))); Assert.False(TypeHelper.IsNumericType(typeof(ulong[]))); // numeric types Assert.True(TypeHelper.IsNumericType(typeof(byte))); Assert.True(TypeHelper.IsNumericType(typeof(decimal))); Assert.True(TypeHelper.IsNumericType(typeof(double))); Assert.True(TypeHelper.IsNumericType(typeof(short))); Assert.True(TypeHelper.IsNumericType(typeof(int))); Assert.True(TypeHelper.IsNumericType(typeof(long))); Assert.True(TypeHelper.IsNumericType(typeof(sbyte))); Assert.True(TypeHelper.IsNumericType(typeof(float))); Assert.True(TypeHelper.IsNumericType(typeof(ushort))); Assert.True(TypeHelper.IsNumericType(typeof(uint))); Assert.True(TypeHelper.IsNumericType(typeof(ulong))); // Nullable non-numeric types Assert.False(TypeHelper.IsNumericType(typeof(bool?))); Assert.False(TypeHelper.IsNumericType(typeof(char?))); Assert.False(TypeHelper.IsNumericType(typeof(DateTime?))); // Nullable numeric types Assert.True(TypeHelper.IsNumericType(typeof(byte?))); Assert.True(TypeHelper.IsNumericType(typeof(decimal?))); Assert.True(TypeHelper.IsNumericType(typeof(double?))); Assert.True(TypeHelper.IsNumericType(typeof(short?))); Assert.True(TypeHelper.IsNumericType(typeof(int?))); Assert.True(TypeHelper.IsNumericType(typeof(long?))); Assert.True(TypeHelper.IsNumericType(typeof(sbyte?))); Assert.True(TypeHelper.IsNumericType(typeof(float?))); Assert.True(TypeHelper.IsNumericType(typeof(ushort?))); Assert.True(TypeHelper.IsNumericType(typeof(uint?))); Assert.True(TypeHelper.IsNumericType(typeof(ulong?))); // Testing with GetType because of handling with non-numerics. See: // http://msdn.microsoft.com/en-us/library/ms366789.aspx // Using GetType - non-numeric Assert.False(TypeHelper.IsNumericType((new object()).GetType())); Assert.False(TypeHelper.IsNumericType(DBNull.Value.GetType())); Assert.False(TypeHelper.IsNumericType(true.GetType())); Assert.False(TypeHelper.IsNumericType('a'.GetType())); Assert.False(TypeHelper.IsNumericType((new DateTime(2009, 1, 1)).GetType())); Assert.False(TypeHelper.IsNumericType(string.Empty.GetType())); // Using GetType - numeric types // ReSharper disable RedundantCast Assert.True(TypeHelper.IsNumericType((new byte()).GetType())); Assert.True(TypeHelper.IsNumericType(43.2m.GetType())); Assert.True(TypeHelper.IsNumericType(43.2d.GetType())); Assert.True(TypeHelper.IsNumericType(((short)2).GetType())); Assert.True(TypeHelper.IsNumericType(((int)2).GetType())); Assert.True(TypeHelper.IsNumericType(((long)2).GetType())); Assert.True(TypeHelper.IsNumericType(((sbyte)2).GetType())); Assert.True(TypeHelper.IsNumericType(2f.GetType())); Assert.True(TypeHelper.IsNumericType(((ushort)2).GetType())); Assert.True(TypeHelper.IsNumericType(((uint)2).GetType())); Assert.True(TypeHelper.IsNumericType(((ulong)2).GetType())); // ReSharper restore RedundantCast // Using GetType - nullable non-numeric types bool? nullableBool = true; Assert.False(TypeHelper.IsNumericType(nullableBool.GetType())); char? nullableChar = ' '; Assert.False(TypeHelper.IsNumericType(nullableChar.GetType())); DateTime? nullableDateTime = new DateTime(2009, 1, 1); Assert.False(TypeHelper.IsNumericType(nullableDateTime.GetType())); // Using GetType - nullable numeric types byte? nullableByte = 12; Assert.True(TypeHelper.IsNumericType(nullableByte.GetType())); decimal? nullableDecimal = 12.2m; Assert.True(TypeHelper.IsNumericType(nullableDecimal.GetType())); double? nullableDouble = 12.32; Assert.True(TypeHelper.IsNumericType(nullableDouble.GetType())); short? nullableInt16 = 12; Assert.True(TypeHelper.IsNumericType(nullableInt16.GetType())); short? nullableInt32 = 12; Assert.True(TypeHelper.IsNumericType(nullableInt32.GetType())); short? nullableInt64 = 12; Assert.True(TypeHelper.IsNumericType(nullableInt64.GetType())); sbyte? nullableSByte = 12; Assert.True(TypeHelper.IsNumericType(nullableSByte.GetType())); float? nullableSingle = 3.2f; Assert.True(TypeHelper.IsNumericType(nullableSingle.GetType())); ushort? nullableUInt16 = 12; Assert.True(TypeHelper.IsNumericType(nullableUInt16.GetType())); ushort? nullableUInt32 = 12; Assert.True(TypeHelper.IsNumericType(nullableUInt32.GetType())); ushort? nullableUInt64 = 12; Assert.True(TypeHelper.IsNumericType(nullableUInt64.GetType())); } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POUsing .Net, how can I determine if a type is a Numeric ValueType?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USNeo
    1. USSFun28
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POUsing .Net, how can I determine if a type is a Numeric ValueType?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COTo add to this gravediggery, if you're going to define IsNumericType to take a type, why not recursively pass the result of Nullable.GetUnderlyingType to the same function and return its value?
      singulars
      1. PO
      1. USlsuarez
    2. COyup...great suggestion. more elegant that way. updated post.
      singulars
      1. PO
      1. USSFun28
    3. COwhy not declare this method in a static class and make it available to Type: `public static bool IsNumeric(this Type type) { /*...*/ }` ?
      singulars
      1. PO
      1. UScimnine
 

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