换行的字符串 "This string\nhas two lines" 字符串中使用单引号时应该怎么写 'You\'re right, it can\'t be a quote' 把数字变成字符串并保留两位小数 var n = 123456.789 n.toFixed(0); //"123457" n.toFixed(2); //"123456.79" parseFloat(str)str以非数字开头,则返回NaN parseFloat(str)
1 exec sp_executesql N'SELECT 2 [Extent2].[Id] AS [Id], 3 [Extent2].[Name] AS [Name], 4 [Extent2].[Description] AS [Description], 5 [Extent2].[RoleTypeNum] AS [RoleTypeNum], 6 [Extent2].[IsDeleted] AS [IsDeleted], 7 [Extent2].[AddDate] AS [AddDate],
出错: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' for the 'System.Data.SqlClient' ADO.NET provider could not be load
一:可选择保留位数,注释很解释的很详细,上图 二:全部代码 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Round { public partial cla