CODEWITHSUNDEEP
entity-framework
AnonyMouse
AnonyMouse

Reputation: 18650

Entity Framework Data Annotations Set StringLength VarChar

I have this setting in my model:

[StringLength(250)]
public string Comment { get; set; }

to set the maximum length to 250 in the database which is great.

However it's set as nvarchar(250) when the database person was expecting varchar(250).

Can somebody please tell me how to set it as a varchar from the model as opposed to an nvarchar?

Upvotes: 61

Views: 71006

Answers (3)

Moses
Moses

Reputation: 88

Visual Studio 2022 using Net 6 and EF Core 6, database first using the -DataAnnotations parameter creates the following attributes

 /* Nullable column */
 [StringLength(250)]
 [Unicode(false)]
 public string? Comment { get; set; }

 /* Non-Nullable column */
 [StringLength(250)]
 [Unicode(false)]
 public string Comment { get; set; } = null!;

Upvotes: 0

amd3
amd3

Reputation: 846

For some reason this older post keeps coming up in my search... so just FYI, using EF6 Core it's combined. The above answer errors out for me.

[Column(TypeName = "VARCHAR(250)")]
public string Comment {get;set;}

Upvotes: 25

Eranga
Eranga

Reputation: 32447

Use ColumnAttribute to give the datatype

[Column(TypeName = "VARCHAR")]
[StringLength(250)]
public string Comment { get; set; }

Or use fluent API

modelBuilder.Entity<MyEntity>()
  .Property(e => e.Comment).HasColumnType("VARCHAR").HasMaxLength(250);

Upvotes: 139

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