converttype.cs

一个网页的系统例子

using System;
using System.Data;
using System.Data.OleDb;

namespace Common
{
	/// <summary>
	/// Convert 的摘要说明。
	/// </summary>
	public class ConvertType
	{
		public ConvertType()
		{
			//
			// TODO: 在此处添加构造函数逻辑
			//
		}

		public static String GetString(Object objValue) 
		{
			if (objValue == System.DBNull.Value)
			{
				return "";
			}
			else
			{
				return objValue.ToString();
			}
		}

		public static decimal GetDecimal(Object objValue)
		{
			try
			{
				if (objValue == DBNull.Value) 
				{
					return  -1;
				}
				else
				{
					return decimal.Parse(objValue.ToString());
				}
			}
			catch
			{
				return -1;
			}
		}

		public static int GetInt(Object objValue)
		{
			try
			{
				if (objValue == DBNull.Value) 
				{
					return  -1;
				}
				else
				{
					return int.Parse(objValue.ToString());
				}
			}
			catch
			{
				return -1;
			}
		}

		public static object GetNullableDBValue(object objValue)
		{
			if (objValue.ToString() == "")
			{
				return DBNull.Value;
			}
			else
			{
				return objValue;
			}
		}
	}
}