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3可选预售设置失败下架

AllBase/Extension/Extensions.cs

@@ -0,0 +1,101 @@
+using NaiBa.Util.Extension;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AllBase.Extension
+{
+    public static class Extensions
+    {
+        public static long? ParseToNullableLong(this object obj)
+        {
+            if (obj == null)
+                return null;
+
+            try
+            {
+                string str = obj.ParseToString();
+                if (string.IsNullOrEmpty(str))
+                {
+                    return null;
+                }
+                return long.Parse(str);
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        public static int? ParseToNullableInt(this object str)
+        {
+            if (str == null)
+                return null;
+
+            try
+            {
+                return Convert.ToInt32(str);
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        public static decimal? ParseToNullableDecimal(this object str)
+        {
+            try
+            {
+                if (str == null)
+                    return null;
+                return decimal.Parse(str.ToString());
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        public static DateTime? ParseToNullableDateTime(this string str)
+        {
+            try
+            {
+                if (string.IsNullOrWhiteSpace(str))
+                {
+                    return null;
+                }
+                if (str.Contains("-") || str.Contains("/"))
+                {
+                    return DateTime.Parse(str);
+                }
+                else
+                {
+                    int length = str.Length;
+                    switch (length)
+                    {
+                        case 4:
+                            return DateTime.ParseExact(str, "yyyy", System.Globalization.CultureInfo.CurrentCulture);
+                        case 6:
+                            return DateTime.ParseExact(str, "yyyyMM", System.Globalization.CultureInfo.CurrentCulture);
+                        case 8:
+                            return DateTime.ParseExact(str, "yyyyMMdd", System.Globalization.CultureInfo.CurrentCulture);
+                        case 10:
+                            return DateTime.ParseExact(str, "yyyyMMddHH", System.Globalization.CultureInfo.CurrentCulture);
+                        case 12:
+                            return DateTime.ParseExact(str, "yyyyMMddHHmm", System.Globalization.CultureInfo.CurrentCulture);
+                        case 14:
+                            return DateTime.ParseExact(str, "yyyyMMddHHmmss", System.Globalization.CultureInfo.CurrentCulture);
+                        default:
+                            return DateTime.ParseExact(str, "yyyyMMddHHmmss", System.Globalization.CultureInfo.CurrentCulture);
+                    }
+                }
+            }
+            catch
+            {
+                return null;
+            }
+        }
+    }
+}