I am trying to link my SQL Server Express database to a chart in ac# application. I am trying to extract the age of some employees to display them in a bar char. Here is my code string constring = "Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\Michael\Downloads\Employee\Employee\Employee\EmployeeDetails.mdf;Integrated Security=True;User Instance=True;Initial Catalog=Employee"; SqlConnect
我正在尝试将我的SQL Server Express数据库链接到ac＃应用程序中的图表。 我试图提取一些员工的年龄，以显示他们在栏中的字符。 这是我的代码 string constring = "Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\Michael\Downloads\Employee\Employee\Employee\EmployeeDetails.mdf;Integrated Security=True;User Instance=True;Initial Catalog=Employee"; SqlConnection conDatabase = new SqlConnection(constring
Error 1 The best overloaded method match for 'int.TryParse(string, out int)' has some invalid arguments Error 2 Argument 1: cannot convert from 'int' to 'string' It gives me error in "int.TryParse(surveys.First(), out id);" L var surveys = (from su in DbContext.Surveys where su.userName == su.userName
错误1'int.TryParse（string，out int）'的最佳重载方法匹配有一些无效参数 错误2参数1：无法从'int'转换为'string' 它给我错误“int.TryParse（surveys.First（），out id）;” L var surveys = (from su in DbContext.Surveys where su.userName == su.userName select su.ID); if(surveys.Count() > 0) {
I'm quite new to C#. I'm converting something from VB into C#. Having a problem with the syntax of this statement: if ((searchResult.Properties["user"].Count > 0)) { profile.User = System.Text.Encoding.UTF8.GetString(searchResult.Properties["user"][0]); } I then see the following errors: Argument 1: cannot convert from 'object' to 'byte[]' The best overloade
我对C＃很陌生。 我正在从VB转换成C＃。 这个语句的语法有问题： if ((searchResult.Properties["user"].Count > 0)) { profile.User = System.Text.Encoding.UTF8.GetString(searchResult.Properties["user"][0]); } 然后我看到以下错误： 参数1：不能从'object'转换为'byte []' 'System.Text.Encoding.GetString（byte []）'的最佳重载方法匹配有一些无效参数 我试图修复基于这篇文
New to C# Just wondering what the error is, can't understand the error. No need to correct, just want to know the mistake. ERROR: The best overloaded method match for 'Systems.Collections.Generic.List.BinarySearch(int,System.Collections.Generic.Icomparer)' has some invalid arguments Argument1: Cannot convert from system.collections.generic.list to int Argument2: Cannot convert from
新的C＃只是想知道错误是什么，无法理解错误。 不需要更正，只是想知道错误。 错误：对'Systems.Collections.Generic.List.BinarySearch（int，System.Collections.Generic.Icomparer）'的最佳重载方法匹配具有一些无效参数Argument1：无法从system.collections.generic.list转换为int Argument2：无法从int转换为system.collections.generic.icomparer using System; using System.Collections.Generic; using System
'using System; 'using System.Collections.Generic; 'using System.Drawing; 'using System.Windows.Forms; 'using Emgu.CV; 'using Emgu.CV.Structure; 'using Emgu.CV.CvEnum; 'using System.IO; 'using System.Diagnostics; 'using System.Runtime.InteropServices; 'namespace FaceStat '{ 'class Form1 : Form { // public static extern void AsmSearchDll(out int nlmarks, out int lmarks, string imgnam
'using System; 'using System.Collections.Generic; 'using System.Drawing; 'using System.Windows.Forms; 'using Emgu.CV; 'using Emgu.CV.Structure; 'using Emgu.CV.CvEnum; 'using System.IO; 'using System.Diagnostics; 'using System.Runtime.InteropServices; 'namespace FaceStat '{ 'class Form1 : Form { // public static extern void AsmSearchDll(out int nlmarks, out int lmarks, string imgnam
I'm trying to convert the hexadecimal representation of a 64-bit number (eg, the string "FFFFFFFFF" ) to binary representation ( "11111..." ). I've tried string result = Convert.ToString(Convert.ToUInt64(value, 16), 2); but this results in a confusing compiler error: The best overloaded method match for 'System.Convert.ToString(object, System.IFormatProvider)
我试图将64位数字的十六进制表示（例如字符串"FFFFFFFFF" ）转换为二进制表示（ "11111..." ）。 我试过了 string result = Convert.ToString(Convert.ToUInt64(value, 16), 2); 但是这会导致一个令人困惑的编译器错误： 'System.Convert.ToString（object，System.IFormatProvider）'的最佳重载方法匹配有一些无效参数 参数2：无法从'int'转换为'System.IFormatProvider'
I'm having a problem with a linq query. I have used this similarly before but i cannot understand what could be wrong now. Errors The best overloaded method match for 'System.Collections.Generic.List.Contains(int)' has some invalid arguments Argument '1': cannot convert from 'int?' to 'int' ; refers to the where clause of rTestResults Code: List<
我遇到了linq查询的问题。 我以前使用过类似的方法，但是我不明白现在可能会出现什么问题。 错误 'System.Collections.Generic.List.Contains（int）'的最佳重载方法匹配有一些无效参数 参数'1'：不能从'int？'转换 到'int'; 指的是rTestResults的where子句 码： List<int> rMTCPlates = (from rP in mDataContext.Plates where rP.SOItem.SONumberID
What is the best way to implement a bitwise memmove ? The method should take an additional destination and source bit-offset and the count should be in bits too. I saw that ARM provides a non-standard _membitmove , which does exactly what I need, but I couldn't find its source. Bind's bitset includes isc_bitstring_copy , but it's not efficient I'm aware that the C standard
什么是实现按位的最佳方式memmove ？ 该方法应该采取额外的目的地和源的位偏移和计数应在比特太。 我看到ARM提供了非标准_membitmove ，这不正是我需要的，但我找不到它的来源。 绑定的bitset包含isc_bitstring_copy ，但效率不高 我知道C标准库不提供这样的方法，但我也找不到任何提供类似方法的第三方代码。 由于高级语言将最小单位提供为1字节，因此不会有标准功能为您提供此选项。 也许你可以找一个提供这些功能的
I want to use a track-bar to change a form's opacity. This is my code: decimal trans = trackBar1.Value / 5000; this.Opacity = trans; When I build the application, it gives the following error: Cannot implicitly convert type 'decimal' to 'double' . I tried using trans and double but then the control doesn't work. This code worked fine in a past VB.NET project. An
我想使用轨迹栏来更改窗体的不透明度。 这是我的代码： decimal trans = trackBar1.Value / 5000; this.Opacity = trans; 当我构建应用程序时，会出现以下错误： 不能将类型'decimal'隐式转换为'double' 。 我尝试使用trans和double但然后控制不起作用。 此代码在过去的VB.NET项目中运行良好。 没有必要明确地强制转换成这样的形式： double trans = (double) trackBar1.Value / 5000.0; 将常量标
We have a ASP.NET website in .NET which is running successfully in production. we have frequently maintain our server on a particular downtime. Hence, We need a feature to redirect all request to Site Under maintenance web page at downtime. I've accomplished this task with Custom Handler but my customer isn't happy with that solution. Please suggest some alternate solution. My Custo
我们在.NET中有一个ASP.NET网站，它正在生产中成功运行。 我们经常在特定的停机时间维护我们的服务器。 因此，我们需要一个功能来将所有请求重定向到停机时间的维护网页。 我已经使用Custom Handler完成了这项任务，但我的客户对此解决方案并不满意。 请建议一些备用解决方案。 我的自定义处理程序代码如下 在web.config中添加 <system.webServer> <modules> <add name="CustomMod