using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;

namespace Mesnac.Basic
{
    /// <summary>
    /// 数据处理器
    /// </summary>
    public class DataProcessor
    {
        /// <summary>
        /// 获取Short数据列的值
        /// </summary>
        /// <param name="dr"></param>
        /// <param name="field"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static short RowValue(DataRow dr, string field, short defaultValue)
        {
            short Result = defaultValue;
            if (dr.Table.Columns.Contains(field))
            {
                if (dr[field] != null && dr[field] != DBNull.Value)
                {
                    if (short.TryParse(dr[field].ToString(), out Result))
                    {
                        return Result;
                    }
                }
            }
            else
            {
                ICSharpCode.Core.LoggingService.Error("DataTable中不存在[" + field + "]列!");
            }
            return defaultValue;
        }
        /// <summary>
        /// 获取整型数据列的值
        /// </summary>
        /// <param name="dr"></param>
        /// <param name="field"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static int RowValue(DataRow dr, string field, int defaultValue)
        {
            int Result = defaultValue;
            if (dr.Table.Columns.Contains(field))
            {
                if (dr[field] != null && dr[field] != DBNull.Value)
                {
                    if (int.TryParse(dr[field].ToString(), out Result))
                    {
                        return Result;
                    }
                }
            }
            else
            {
                ICSharpCode.Core.LoggingService.Error("DataTable中不存在[" + field + "]列!");
            }
            return defaultValue;
        }
        /// <summary>
        /// 获取double数据列的值
        /// </summary>
        /// <param name="dr"></param>
        /// <param name="field"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static double RowValue(DataRow dr, string field, double defaultValue)
        {
            double Result = defaultValue;
            if (dr.Table.Columns.Contains(field))
            {
                if (dr[field] != null && dr[field] != DBNull.Value)
                {
                    if (double.TryParse(dr[field].ToString(), out Result))
                    {
                        return Result;
                    }
                }
            }
            else
            {
                ICSharpCode.Core.LoggingService.Error("DataTable中不存在[" + field + "]列!");
            }
            return defaultValue;
        }
        /// <summary>
        /// 获取DateTime数据列的值
        /// </summary>
        /// <param name="dr"></param>
        /// <param name="field"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static DateTime RowValue(DataRow dr, string field, DateTime defaultValue)
        {
            DateTime Result = defaultValue;
            if (dr.Table.Columns.Contains(field))
            {
                if (dr[field] != null && dr[field] != DBNull.Value)
                {
                    if (DateTime.TryParse(dr[field].ToString(), out Result))
                    {
                        return Result;
                    }
                }
            }
            else
            {
                ICSharpCode.Core.LoggingService.Error("DataTable中不存在[" + field + "]列!");
            }
            return defaultValue;
        }
        /// <summary>
        /// 获取字符串数据列的值
        /// </summary>
        /// <param name="dr"></param>
        /// <param name="field"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static string RowValue(DataRow dr, string field, string defaultValue)
        {
            if (dr.Table.Columns.Contains(field))
            {
                if (dr[field] != null && dr[field] != DBNull.Value)
                {
                    return dr[field].ToString().Trim();
                }
            }
            else
            {
                ICSharpCode.Core.LoggingService.Error("DataTable中不存在[" + field + "]列!");
            }
            return defaultValue;
        }
    }
}