NUMBER类型细讲：
Oracle number datatype 语法：NUMBER[(precision [, scale])]
简称：precision --> p
      scale     --> s

最近一直在弄第三方控件DevExpress,在gridcontol中嵌套进复选框，却只能单选，为了解决此问题在网上查了相关资料，并结合项目情况，最终得以解决

1.

ICE_selectedMark.QueryCheckStateByValue += new DevExpress.XtraEditors.Controls.QueryCheckStateByValueEventHandler(ICE_selectedMark_QueryCheckStateByValue);

2.

/// <summary>
/// 处理 RepositoryItemCheckEdit 类型的选择框多选
/// </summary>
/// <param name='sender'></param>
/// <param name='e'></param>
void ICE_selectedMark_QueryCheckStateByValue(object sender, DevExpress.XtraEditors.Controls.QueryCheckStateByValueEventArgs e)
{
string val = '';
if (e.Value != null)
{
val = e.Value.ToString();
}
else
{
val = 'True'; //默认为选中
}
switch (val)
{
case 'True':
case 'Yes':
case '1':
e.CheckState = CheckState.Checked;
break;
case