70 lines
2.4 KiB
C#
70 lines
2.4 KiB
C#
using System.ComponentModel.DataAnnotations.Resources;
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using System.Diagnostics.CodeAnalysis;
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using System.Globalization;
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namespace System.ComponentModel.DataAnnotations.Schema {
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/// <summary>
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/// Specifies the database column that a property is mapped to.
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/// </summary>
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[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
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[SuppressMessage("Microsoft.Performance", "CA1813:AvoidUnsealedAttributes", Justification = "We want users to be able to extend this class")]
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public class ColumnAttribute : Attribute {
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private readonly string _name;
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private string _typeName;
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private int _order = -1;
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/// <summary>
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/// Initializes a new instance of the <see cref="ColumnAttribute"/> class.
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/// </summary>
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public ColumnAttribute() {
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="ColumnAttribute"/> class.
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/// </summary>
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/// <param name="name">The name of the column the property is mapped to.</param>
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public ColumnAttribute(string name) {
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if (string.IsNullOrWhiteSpace(name)) {
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throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, DataAnnotationsResources.ArgumentIsNullOrWhitespace, "name"));
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}
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_name = name;
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}
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/// <summary>
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/// The name of the column the property is mapped to.
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/// </summary>
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public string Name {
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get { return _name; }
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}
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/// <summary>
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/// The zero-based order of the column the property is mapped to.
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/// </summary>
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public int Order {
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get { return _order; }
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set {
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if (value < 0) {
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throw new ArgumentOutOfRangeException("value");
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}
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_order = value;
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}
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}
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/// <summary>
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/// The database provider specific data type of the column the property is mapped to.
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/// </summary>
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public string TypeName {
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get { return _typeName; }
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set {
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if (string.IsNullOrWhiteSpace(value)) {
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throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, DataAnnotationsResources.ArgumentIsNullOrWhitespace, "value"));
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}
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_typeName = value;
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}
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}
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}
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}
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