Question

我有以下类，我已使用[NotMapped]属性标记了所有非基元。然而它继续给我以下错误：

我正在使用：

VS 2010 SP1
.Net 4.0（C＃） - WinForms
实体框架5.0代码优先
SQL Compact（CE）3.5

The type 'MySolution.Core.Blob' was not mapped. Check that the type has not been explicitly excluded by using the Ignore method or NotMappedAttribute data annotation. Verify that the type was defined as a class, is not primitive, nested or generic, and does not inherit from EntityObject.

[System.ComponentModel.DataAnnotations.Schema.Table("Blob")]
public partial class Blob
{
    [System.ComponentModel.DataAnnotations.Schema.NotMapped]
    private AForge.Imaging.Blob BlobInternal { get; set; }

    public Blob ()
    {
        this.BlobInternal = new AForge.Imaging.Blob(0, new System.Drawing.Rectangle());
    }

    public Blob (int id, System.Drawing.Rectangle rect)
    {
        this.BlobInternal = new AForge.Imaging.Blob(id, rect);
    }

    public Blob (AForge.Imaging.Blob source)
    {
        this.BlobInternal = new AForge.Imaging.Blob(source);
    }

    [System.ComponentModel.DataAnnotations.Schema.Column("OriginalSize")]
    public bool OriginalSize { get { return (this.BlobInternal.OriginalSize); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("Id")]
    public int Id { get { return (this.BlobInternal.ID); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("Area")]
    public int Area { get { return (this.BlobInternal.Area); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("Fullness")]
    public double Fullness { get { return (this.BlobInternal.Fullness); } }

    [System.ComponentModel.DataAnnotations.Schema.NotMapped]
    public AForge.Point CenterOfGravity { get { return (this.BlobInternal.CenterOfGravity); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("CenterOfGravityX")]
    public float CenterOfGravityX { get { return (this.BlobInternal.CenterOfGravity.X); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("CenterOfGravityY")]
    public float CenterOfGravityY { get { return (this.BlobInternal.CenterOfGravity.Y); } }

    [System.ComponentModel.DataAnnotations.Schema.NotMapped]
    public System.Drawing.Rectangle Rectangle { get { return (this.BlobInternal.Rectangle); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("RectangleX")]
    public int RectangleX { get { return (this.BlobInternal.Rectangle.X); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("RectangleY")]
    public int RectangleY { get { return (this.BlobInternal.Rectangle.Y); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("RectangleW")]
    public int RectangleW { get { return (this.BlobInternal.Rectangle.Width); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("RectangleH")]
    public int RectangleH { get { return (this.BlobInternal.Rectangle.Height); } }

    [System.ComponentModel.DataAnnotations.Schema.NotMapped]
    public System.Drawing.Color ColorMean { get { return (this.BlobInternal.ColorMean); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorMeanA")]
    public byte ColorMeanA { get { return (this.BlobInternal.ColorMean.A); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorMeanR")]
    public byte ColorMeanR { get { return (this.BlobInternal.ColorMean.R); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorMeanG")]
    public byte ColorMeanG { get { return (this.BlobInternal.ColorMean.G); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorMeanB")]
    public byte ColorMeanB { get { return (this.BlobInternal.ColorMean.B); } }

    [System.ComponentModel.DataAnnotations.Schema.NotMapped]
    public System.Drawing.Color ColorStdDev { get { return (this.BlobInternal.ColorStdDev); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorStdDevA")]
    public byte ColorStdDevA { get { return (this.BlobInternal.ColorStdDev.A); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorStdDevR")]
    public byte ColorStdDevR { get { return (this.BlobInternal.ColorStdDev.R); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorStdDevG")]
    public byte ColorStdDevG { get { return (this.BlobInternal.ColorStdDev.G); } }

    [System.ComponentModel.DataAnnotations.Schema.Column("ColorStdDevB")]
    public byte ColorStdDevB { get { return (this.BlobInternal.ColorStdDev.B); } }

    [System.ComponentModel.DataAnnotations.Schema.NotMapped]
    public AForge.Imaging.UnmanagedImage Image { get { return (this.BlobInternal.Image); } }
}

Answer 1

如果要将EF Code Fisrt与SQL CE一起使用，则需要为其配置ConectionFactory。

您可以看到使用SQL CE运行EF的唯一行是：

Database.DefaultConnectionFactory = new SqlCeConnectionFactory（“System.Data.SqlServerCe.3.5”）;

您可以下载in the MSDN Gallery

的示例

实体框架5.0代码优先映射异常

1 个答案: