ASP.Net MVC 3将字符串属性绑定为string.Empty而不是null

Question

模特是

public partial class BilingualString 
{ 
    public string RuString { get; set; } 
    public string EnString { get; set; } 
} 

public partial class Member 
{  
   public Member() 
   { 
       this.DisplayName = new BilingualString(); 
   } 
   public BilingualString DisplayName { get; set; } 
} 

如果用户没有填充输入,则RuString和EnString的值为null.我需要string.Empty而不是null.

像这样使用CustomModelBinder:

public class EmptyStringModelBinder : DefaultModelBinder 
{ 
    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) 
    { 
        bindingContext.ModelMetadata.ConvertEmptyStringToNull = false; 
        return base.BindModel(controllerContext, bindingContext); 
    } 
} 

没有帮助.

Answer 1

用这个:

    [DisplayFormat(ConvertEmptyStringToNull=false)]
    public string RuString { get; set; }

要么

    private string _RuString;
    public string RuString {
        get {
            return this._RuString ?? "";
        }
        set {
            this._RuString = value ?? "";
        }
    }