DisplayAttribute没作用,why?

最新推荐文章于 2024-12-26 10:32:40 发布

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最新推荐文章于 2024-12-26 10:32:40 发布

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本文探讨了在使用DataGridView绑定特定实体类时遇到的问题：即DisplayAttribute标记的中文列名未能正确显示。通过手动设置列头名称的方式解决了该问题。

namespace WebBulletinBoard.DataAccess
{
    using System;
    using System.ComponentModel.DataAnnotations;
    using System.ComponentModel.DataAnnotations.Schema;

    [Table("BulletinBoardFile")]
    public partial class BulletinBoardFile
    {
        [Key] 
        public Guid FileKeyID { get; set; }
        [Display(Name = "展示日期", Order = 0)]
        [StringLength(10)]
        public string WorkDate { get; set; }
        [Display(Name = "公告抬头", Order = 1)]
        [StringLength(1024)]
        public string BulletinTitle { get; set; }
        [Display(Name = "公告描述", Order = 2)]
        [StringLength(1024)]
        public string BulletinContexnt { get; set; }
        [Display(Name = "发布人", Order = 4)]
        [StringLength(30)]
        public string UploadUser { get; set; }
        [Display(Name = "发布时间", Order = 3)]
        public DateTime? UploadDateTime { get; set; }
        [Display(Name = "文件名", Order = 5)]
        [StringLength(255)]
        public string FileName { get; set; }

        [Column(TypeName = "image")]
        public byte[] BinaryData { get; set; }
        [Display(Name = "显示天数", Order = 6)]
        public int DisplayDays { get; set; }

        public int? OderIndex { get; set; }

        [Column(TypeName = "timestamp")]
        [DatabaseGenerated(DatabaseGeneratedOption.Computed)]
        [MaxLength(8)]
        public byte[] RowVersion { get; set; }
    }
}

上面是实体类的定义。在给DataGridView绑定了上面的实体作为数据源之后，DisplayAttribute标记的中文列名没有显示出来。为什么呢？

实在没有办法，手动使用下面的办法解决了。

if (GridView1.Columns.Count > 0)
                {
                    var props = typeof(BulletinBoardFile).GetProperties();
                    foreach (var p in props)
                    {
                        var colParaObj = (DisplayAttribute)p.GetCustomAttributes(typeof(DisplayAttribute), false).FirstOrDefault();
                        if (colParaObj != null)
                        {
                            for (int i = 0; i < GridView1.Columns.Count; i++)
                            {
                                if (GridView1.Columns[i].HeaderText.Equals(p.Name))
                                {
                                    GridView1.Columns[i].HeaderText = colParaObj.Name;
                                    break;
                                }
                            }
                        }
                    }
                }

如果凑巧看到这篇文章请赐教！