private void Abc()
{
string first="";
ArrayList result = new ArrayList();
ArrayList secResult = new ArrayList();
foreach (string second in result)
{
if (first != null)
{
foreach (string third in secResult)
{
string target;
}
}
string target;//Here I cannot decalre it. And if I don't declare it and
//want to use it then also I cannot use it. And if it is in if condition like
//the code commented below, then there is no any complier error.
//if …Run Code Online (Sandbox Code Playgroud) 所以我需要和学生一起上课.输入必须在0-100之间,否则它不接受来自用户的输入.
Console.WriteLine("How many students?");
int num1 = Keyboard.ReadInt();
int[] array = new int[num1];
Console.WriteLine("Give the student grades: ");
for (int i = 0; i < array.Length; i++)
{
int wrong;
wrong = Keyboard.ReadInt();
if (wrong > 0 && wrong <= 100)
{
array[i] = wrong;
}
else
{
while (wrong < 0 && wrong >= 100)
{
Console.WriteLine("Wrong input:");
wrong = Keyboard.ReadInt();
}
}
Run Code Online (Sandbox Code Playgroud) 这是我在C中的第一个链接列表程序,我试图初始化节点的值并尝试打印它.但是,它没有给我预期的输出.谁能让我知道我哪里错了?
#include<stdio.h>
#include<stdlib.h>
struct node
{
int key;
struct node *next;
};
typedef struct node NODE;
int main ()
{
NODE a,b,c;
NODE *list;
list=&a;
list->key = 10;
list->next = &b;
list->next->key=20;
list->next->next=&c;
list->next->next->key=30;
list->next->next->next=NULL;
printf("%d %d %d", a,b,c);
return 0;
}
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它打印10和20之间有一些垃圾.
我正在使用EPPlus导出excel.我已经完成了一些功能来获得"ExcelWorksheet".我想在一个excel(每个标签一个)中使用它加入所有这些,但我不知道我该怎么做.
这是主要功能:
public ActionResult ExportReports(string sheetName)
{
try
{
var req = GetRequest();
var fileDownloadName = "OnlineReport.xlsx";
var contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
var package = new ExcelPackage();
var ws1 = AnalysisByAirCarrier(package, req);
var ws2 = Summary(package, req);
var fileStream = new MemoryStream();
package.SaveAs(fileStream);
fileStream.Position = 0;
var fsr = new FileStreamResult(fileStream, contentType);
fsr.FileDownloadName = fileDownloadName;
return fsr;
}
catch (Exception ex)
{
_logger.Error("Error ExportReports", ex);
}
}
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我想在不同选项卡中的同一文件中加入ws1和ws2.
注意:ws1和ws2是ExcelWorksheet对象
任何的想法??
谢谢.
更新服务引用后,我收到以下错误构建我的项目:
不包含'DefaultResolveType'的定义
在自动生成的Reference.cs上抛出错误,但DefaultResolveType方法应该在生成的类中,因为它是从'this'关键字调用的.自上次成功构建以来,数据服务没有更改,客户端代码也没有更改.
[global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Data.Services.Design", "1.0.0")]
protected global::System.Type ResolveTypeFromName(string typeName)
{
global::System.Type resolvedType = this.DefaultResolveType(typeName, "Microsoft.Crm.Sdk.Data.Services", "ITF.DataAccessLayer.CRM.CrmAccessService");
if ((resolvedType != null))
{
return resolvedType;
}
return null;
}
Run Code Online (Sandbox Code Playgroud) 我正在尝试使用字符串作为键并使用枚举作为值来创建字典。码:
private enum Continent { Africa, Antarctica, Asia, Australia, Europe, NorthAmerica, SouthAmerica }
static void DemoDictionary()
{
Console.WriteLine("\n\nDictionary Demo: (rivers)");
Console.WriteLine("=========================\n");
Dictionary<string, Continent> rivers = new Dictionary<string, Continent>()
{
{"Nile", Africa},
{"Amazon", SouthAmerica},
{"Danube", Europe}
};
}
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所有的大陆名称都显示the name does not exist in the current context,但我不确定为什么。私有枚举和静态Dictionary方法需要保持不变,因此我需要解决此问题。
我刚接触角度和即时寻找一种调用函数的方法,目前在每次更改后调用,只有在焦点超出该字段之后.这个函数的目的是检查用户是否在某些情况下更改了数据,<td>并且只有在他更改了数据函数时才应该执行.问题是现在每个按键都调用该函数,所以如果使用将2个字符添加到字符串中,<td>它将执行两次.
这是我的表:
<tbody ng-repeat="(user_id,script_id) in data">
<tr ng-repeat="(script_id, cron_format) in script_id">
<td class="userName">{{user(user_id)}}</td>
<td class="scriptName">{{script(script_id)}}</td>
<td class="cronFormat"><input type="text" ng-model="cron_format" ng-change="saveCron(user_id,script_id,cron_format)"/></td>
</tr>
</tbody>
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这是功能:
$scope.$watch('cron_format',function(x,old){
if(x!=old){
}
});
$scope.saveCron = function(userId,scriptId,cronFormat){
$.post("updateCronChange.php",
"user_id="+userId+"&script_id="+scriptId+"&cron_format="+cronFormat,
function(data){
//inside post
alert('cron format changed to:'+cronFormat);
});
}
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任何有角度的方式我只能在焦点离开字段(cron_format)之后调用saveCron()?
我有一段时间以来第一次使用C#,我有一行这样的代码.
SQL = string.Format("PageName = '{0}'", bp.CommandArgument);
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我需要知道如何从任何SQL注入保护对象"bp.CommandArgument".谢谢.
嗨,我是编程新手,请您帮助我:
我在“ To.List()”中遇到错误,错误1无法将类型“ System.Collections.Generic.List”隐式转换为“ System.Collections.Generic.List”
我的代码是:
List<IncByYrMonthModel> GroupedList = (from p in incidentsViewModel
group p by new
{
month = p.DateClosed.Value.Month,
year = p.DateClosed.Value.Year
} into d
select new
{
d.Key.month,
d.Key.year,
count = d.Count()
}).ToList();
return GroupedList;
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我的模特是:
public class IncByYrMonthModel
{
public string Year { get; set; }
public string Month { get; set; }
public string Total { get; set; }
}
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更新的代码
public List<IncByYrMonthModel> GetYrMonth2(HttpSessionStateBase session, int id, int _StrYear)
{
List<IncidentsModel> incidentsViewModel = ViewModelService.Fetch<List<IncidentsModel>>(session, id); …Run Code Online (Sandbox Code Playgroud) 我正在通过C#由Jeffrey Richter阅读CLR,在第115页上有一个由基元上的算术运算产生溢出的例子.有人可以解释一下吗?
Byte b = 100;
b = (Byte) (b+200); // b now contains 44 (or 2C in Hex).
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我知道应该有溢出,因为byte是无符号的8位值,但为什么它的值等于44?