devexpress datagrid 与imageEdit以及如何存图片到数据库

首先建立了一个数据库的表，这个表中，有一个字段是image类型（SQL Server数据库）

USE [SchedulerDB]
GO 

/****** Object:  Table [dbo].[Resources]    Script Date: 11/19/2014 10:16:03 ******/
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Resources]') AND type in (N'U'))
DROP TABLE [dbo].[Resources]
GO

USE [SchedulerDB]
GO 

/****** Object:  Table [dbo].[Resources]    Script Date: 11/19/2014 10:16:03 ******/

SET ANSI_NULLS ON
GO 

SET QUOTED_IDENTIFIER ON
GO 

CREATE TABLE [dbo].[Resources](
    [UniqueID] [int] IDENTITY(1,1) NOT NULL,
    [ResourceID] [int] NOT NULL,
    [ResourceName] [nvarchar](50) NULL,
    [Color] [int] NULL,
    [Image] [image] NULL,
    [CustomField1] [nvarchar](max) NULL,
 CONSTRAINT [PK_Resources] PRIMARY KEY CLUSTERED 
(
    [UniqueID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO 

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'岗位' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'Resources'
GO 

然后与datagrid进行了映射。

然后，在image字段上，绑定一个ImageEdit编辑控件。

然后运行，

然后，就得到这个错误：Object must implement IConvertible

把PictureStoreMode改成ByteArray

然后就OK了。

对了，保存所对应的代码为：

void saveToolStripButton_Click(object sender, EventArgs e)
 {
     this.Validate();
     this.resourcesBindingSource.EndEdit();
     this.resourcesTableAdapter.Update(this.schedulerDBDataSet);
     schedulerDBDataSet.AcceptChanges();
 }