小编Pin*_*inu的帖子

在C#中,我有一个整数值,需要对字符串进行控制,但需要在之前添加零:

例如:

int i = 1;

当我将其转换为字符串时,它需要变为0001

我需要知道C#中的语法.

    [DataMember]
    public int? NumberOfPages;   //////////// Is this supported????
    [DataMember]
    public bool? Color;          //////////// Is this supported????
    [DataMember]
    public int? BulkQuantity;
    [DataMember]

我正在努力在LINQ中获取此SQL查询的结果

SELECT DISTINCT(Type)
FROM  Product
WHERE categoryID = @catID

这是我的存储库查询:

public IQueryable<ProdInfo> GetProdInfo()
        {

            var data = from u in db.Prod
                       select new ProdInfo
                       {
                           PID = u.PID,
                           CatID = u.CatID,                           
                           LastChanged = u.LastChanged,
                           ChangedBy = u.ChangedBy,                               
                           Type = u.Type,
                       };

            return data;
        }

过滤:

public static IQueryable<ProdInfo> GetDistinctProdType(this IQueryable<ProdInfo> qry,int CatID)
            {
                return from p in qry
                       where p.CatID.Equals(CatID)
                       select p;
            }

我需要过滤器来返回不同的prod类型？我怎样才能做到这一点？

这是我的函数,它将pdf转换为png图像,它在这一行上抛出一个错误 - > stream.WriteTo(Response.OutputStream); 有什么不对？？

protected void CreatePngFromPdf() 
        {

            try
            {

                string PDFLocation = string.Format(@"\\XXXX\{0}\{1}\{2}.pdf", Yr, Loc.Substring(0, 4), Loc.Substring(4, 4));
                Utilities.WebPDF.PDF WebPDF = new DocuvaultMVC.Utilities.WebPDF.PDF();

                WebPDF.Credentials = new NetworkCredential(@"xyz", "xyz");
                byte[] png = WebPDF.StreamPdfPageAsPngResize(PDFLocation,PageNumber, 612, 792);

                MemoryStream ms = new MemoryStream(png);
                MemoryStream stream = new MemoryStream();
                int newWidth = 612;
                int newHeight = 792;
                System.Drawing.Image newImg = System.Drawing.Image.FromStream(ms);

                Bitmap temp = new Bitmap(newWidth, newHeight, newImg.PixelFormat);
                Graphics newImage = Graphics.FromImage(temp);
                newImage.DrawImage(newImg, 0, 0, newWidth, newHeight);
                newImg.Dispose();

                temp.Save(stream, ImageFormat.Png);
                stream.WriteTo(Response.OutputStream);
                temp.Dispose();
                stream.Dispose(); …

      <td>
  <%= Html.ActionLink("Delete", "DeleteUser", new RouteValueDictionary(new {uname=item.UserName}), new { onclick = "return confirm('Are you sure you want to delete this User?');" }) %>
    </td>

在Global.asax.cs中

routes.MapRoute(
               "DeleteUser",
               "Account.aspx/DeleteUser/{uname}",
               new { controller = "Account", action = "DeleteUser", uname = "" }
           );

在ActionContorller.cs中

public ActionResult DeleteUser(string uname)
{
   //delete user
}

正在传递的控制器中uname的值是空字符串("").

我有一张桌子Product和另一张桌子ProductLog.

日志表需要跟踪表中的两列Product.每次在这些列上都有插入,更新或删除时,我需要更新日志表.

我是否需要编写三个单独的触发器,或者一个触发器可以处理这些操作？

我还需要知道操作的类型,例如,我需要知道日志表中的条目是否是因为插入或删除或更新.如果有人给我一个很好的例子.

这是不正确的,我们不能动态地将表名传递给选择查询吗？

这给了我一个错误'必须声明表变量@TblName'

DECLARE @TblName VARCHAR(30)
SET @TblName = 'User'
SELECT * 
FROM @TblName

我有一个 Web 服务，它位于这样的反向代理后面：

现在发生的情况是，当我尝试添加 Web 引用来测试 Web 服务时，它说无法下载 wsdl 文件。那是因为当请求被发送时它是https://uat.mywebservice.com/Service/Service.asmx但是当它击中反向代理然后厌倦下载 wsdl 和迪斯科文件时，它会将链接更改为http： //myservice.comp.com/Service/Service.asmx?wsdl这不是正确的链接，因为myservice.comp.com它只是反向代理上的名称空间。

发生的事情是soap文件中的标题被更新到这个命名空间而不是实际的主机名uat.mywebservice.com，我能够看到使用fiddler disco文件的地址不正确。我通过使用 wsdl.exe 工具创建一个代理类，然后将该类中的所有错误链接更新为正确的主机名。

有什么方法可以确保在点击反向代理时地址保持正确。

不正确：   mywebservice.comp.com

<?xml version="1.0" encoding="utf-8" ?> 
<discovery xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.xmlsoap.org/disco/"> 
    <contractRef ref="http://mvwebservice.comp.com/Service/Service.asmx?wsdl" docRef="http://mvwebservice.comp.com/Service/Service.asmx" xmlns="http://schemas.xmlsoap.org/disco/scl/" /> 
    <soap address="http://mywebservice.comp.com/Service/Service.asmx" xmlns:q1="http://tempuri.org/" binding="q1:ServiceSoap" xmlns="http://schemas.xmlsoap.org/disco/soap/" /> 
    <soap address="http://mywebservice.comp.com/Service/Service.asmx" xmlns:q2="http://tempuri.org/" binding="q2:ServiceSoap12" xmlns="http://schemas.xmlsoap.org/disco/soap/" /> 
</discovery>

正确的：   uat.mywebservice.com

<?xml version="1.0" encoding="utf-8" ?> 
<discovery xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.xmlsoap.org/disco/"> 
    <contractRef ref="https://uat.mvwebservice.com/Service/Service.asmx?wsdl" docRef="https://uat.mvwebservice.com/Service/Service.asmx" xmlns="http://schemas.xmlsoap.org/disco/scl/" /> 
    <soap address="https://uat.mywebservice.com/Service/Service.asmx" xmlns:q1="http://tempuri.org/" binding="q1:ServiceSoap" xmlns="http://schemas.xmlsoap.org/disco/soap/" /> 
    <soap address="https://uat.mywebservice.com/Service/Service.asmx" xmlns:q2="http://tempuri.org/" binding="q2:ServiceSoap12" xmlns="http://schemas.xmlsoap.org/disco/soap/" …

我在尝试访问wcf Web服务时遇到此异常.

[WebException: The remote server returned an error: (400) Bad Request.]
  System.Net.HttpWebRequest.GetResponse() +5314029
  System.ServiceModel.Channels.HttpChannelRequest.WaitForReply(TimeSpan timeout) +54

服务器绑定信息

<system.serviceModel>
   <bindings>
      <basicHttpBinding>
         <binding name="wcfSmartConnect" closeTimeout="10:01:00" 
                  maxBufferSize="104857600" maxBufferPoolSize="104857600" 
                  maxReceivedMessageSize="104857600" openTimeout="10:01:00"
                  receiveTimeout="10:10:00" sendTimeout="10:01:00"
                  messageEncoding="Mtom" transferMode="StreamedRequest">
            <readerQuotas maxDepth="104857600" maxStringContentLength="104857600"
                          maxArrayLength="104857600" maxBytesPerRead="104857600" 
                          maxNameTableCharCount="104857600" />
         </binding>
      </basicHttpBinding>
   </bindings>
   <services>
      <service name="WcfSmartConnect.Service1"
               behaviorConfiguration="WcfSmartConnect.Service1Behavior">
         <endpoint 
               address="" 
               binding="basicHttpBinding" 
               bindingConfiguration="wcfSmartConnect"
               contract="WcfSmartConnect.IService1">
            <identity>
               <dns value="localhost" />
            </identity>
         </endpoint>
         <endpoint 
               address="mex" 
               binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
  </services>
  <behaviors>
      <serviceBehaviors>
           <behavior name="WcfSmartConnect.Service1Behavior">
            <serviceMetadata httpGetEnabled="true"/>
                <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
   </behaviors>
</system.serviceModel>

客户端绑定信息

<system.serviceModel>
   <bindings>
      <basicHttpBinding> …

考虑这段代码：

public class CountEnum : EnumDataType
    {
        public static readonly CountEnum CANADA = new CountEnum("CA", "Canada");
        public static readonly CountEnum DEFAULT = new CountEnum();
        private static readonly EnumDataTypeList OPTIONS = new EnumDataTypeList();
        public static readonly CountEnum UNITED_STATES = new CountEnum("US", "United States");
        public static readonly CountEnum UNSET = new CountEnum();


        private CountEnum()
        {
        }

        private CountEnum(string code, string name)
        {
            base.code = code;
            base.name = name;
            OPTIONS.Add(this); // This is the line 23
        }

以下是异常详细信息：

System.TypeInitializationException was caught
  Message=The type …