Common/DTRequest.cs

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using System;
using System.Text;
using System.Web;
using System.Text.RegularExpressions;
namespace Common
{
	/// <summary>
	/// Request操作类
	/// </summary>
	public class DTRequest
	{
		/// <summary>
		/// 判断当前页面是否接收到了Post请求
		/// </summary>
		/// <returns>是否接收到了Post请求</returns>
		public static bool IsPost()
		{
			return HttpContext.Current.Request.HttpMethod.Equals("POST");
		}

        /// <summary>
        /// 获得指定Url参数的值
        /// </summary>
        /// <param name="strName">Url参数</param>
        /// <returns>Url参数的值</returns>
        public static string GetQueryString(string strName)
        {
            return GetQueryString(strName, false);
        }

        /// <summary>
        /// 获得指定Url参数的int类型值
        /// </summary>
        /// <param name="strName">Url参数</param>
        /// <returns>Url参数的int类型值</returns>
        public static int GetQueryInt(string strName)
        {
            return Utils.StrToInt(HttpContext.Current.Request.QueryString[strName], 0);
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float StrToFloat(string expression, float defValue)
        {
            if ((expression == null) || (expression.Length > 10))
                return defValue;

            float intValue = defValue;
            if (expression != null)
            {
                bool IsFloat = Regex.IsMatch(expression, @"^([-]|[0-9])[0-9]*(\.\w*)?$");
                if (IsFloat)
                    float.TryParse(expression, out intValue);
            }
            return intValue;
        }