小编Jul*_*ary的帖子

我有两个int型List像List A和List B.我要检查多少项目List A是那里List B.我能够做到这一点,但是foreach因为优化是我的代码中的主要目标,所以我可以避免这种有效方式.

List<int> A = new List<int>;
List<int> B = new List<int>;
// Some logic....item added in both lists. Then

foreach(var item in A)
{
    if (B.Contains(item))
    {
        // Subtract number of duplicates
    }
}

我尝试使用Intersect和Any,但是返回bool所以我无法完全应用它们.

我发布了一个我的疑问:有没有办法我们可以使用一个查询的结果,然后像我们在SQL中那样进一步加入:

SELECT Applications.* , ApplicationFees.ApplicationNo, ApplicationFees.AccountFundDate1,ApplicationFees.AccountFundDate2 ,ApplicationFees.AccountFundDate3 , ApplicationFees.AccountCloseDate1, ApplicationFees.AccountCloseDate2,ApplicationFees.AccountCloseDate3,
isnull(SUBQRY11.AMNT ,0) as SCMSFEE1R,
isnull(SUBQRY12.AMNT,0) as SCMSFEE2R,
Left Join 
(
SELECT ApplicationNo,COUNT(ApplicationNo) AS CNT, SUM(Amount) as AMNT 
FROM Payments where (FEETYPE=1 AND FeePosition=1)  and (FeeDate>='2011-01-01')
and (FeeDate<='2012-01-01')
GROUP BY ApplicationNo
)SUBQRY11
ON ApplicationFees.ApplicationNo= SUBQRY11.ApplicationNo 
Left Join 
(
SELECT ApplicationNo,COUNT(ApplicationNo) AS CNT2, SUM(Amount) as AMNT 

FROM Payments where (FEETYPE=1 AND FeePosition=2) and (FeeDate>='2011-01-01') 
 and (FeeDate<='2012-01-01')
GROUP BY ApplicationNo )SUBQRY12 ON ApplicationFees.ApplicationNo=SUBQRY12.ApplicationNo

我想避免在查询的foreach中使用相同的内容,因为这将非常耗时.

我有大约10个word文档,我使用open xml和其他东西生成.现在我想创建另一个word文档,我想逐个加入到这个新创建的文档中.我希望使用open xml,任何提示都会很明显.以下是我的代码:

 private void CreateSampleWordDocument()
    {
        //string sourceFile = Path.Combine("D:\\GeneralLetter.dot");
        //string destinationFile = Path.Combine("D:\\New.doc");
        string sourceFile = Path.Combine("D:\\GeneralWelcomeLetter.docx");
        string destinationFile = Path.Combine("D:\\New.docx");
        try
        {
            // Create a copy of the template file and open the copy
            //File.Copy(sourceFile, destinationFile, true);
            using (WordprocessingDocument document = WordprocessingDocument.Open(destinationFile, true))
            {
                // Change the document type to Document
                document.ChangeDocumentType(DocumentFormat.OpenXml.WordprocessingDocumentType.Document);
                //Get the Main Part of the document
                MainDocumentPart mainPart = document.MainDocumentPart;
                mainPart.Document.Save();
            }
        }
        catch
        {
        }
    }

更新(使用AltChunks):

using (WordprocessingDocument myDoc = WordprocessingDocument.Open("D:\\Test.docx", true)) …

我必须创建一个SP,如果它有效,则返回一个值.但它不返回任何东西,我不知道,为什么？

CREATE DEFINER=`root`@`localhost` PROCEDURE `validar_egreso`(
    IN codigo_producto VARCHAR(100),
    IN cantidad INT,
    OUT valido INT(11)
)
BEGIN
    DECLARE resta INT(11);
    SET resta = 0;

    SELECT (s.stock - cantidad) INTO resta
    FROM stock AS s
    WHERE codigo_producto = s.codigo;

    IF (resta > s.stock_minimo) THEN
        SET valido = 1;
    ELSE
        SET valido = -1;
    END IF;
    SELECT valido;
END

我已经从word模板创建了一个docx文件,现在我正在访问复制的docx文件,并希望用某些其他数据替换某些文本.

我无法获得如何从doument主要部分访问文本的提示？

任何帮助都会很明显.

以下是我的代码到现在为止.

private void CreateSampleWordDocument()
    {
        //string sourceFile = Path.Combine("D:\\GeneralLetter.dot");
        //string destinationFile = Path.Combine("D:\\New.doc");
        string sourceFile = Path.Combine("D:\\GeneralWelcomeLetter.docx");
        string destinationFile = Path.Combine("D:\\New.docx");
        try
        {
            // Create a copy of the template file and open the copy
            File.Copy(sourceFile, destinationFile, true);
            using (WordprocessingDocument document = WordprocessingDocument.Open(destinationFile, true))
            {
                // Change the document type to Document
                document.ChangeDocumentType(DocumentFormat.OpenXml.WordprocessingDocumentType.Document);
                //Get the Main Part of the document
                MainDocumentPart mainPart = document.MainDocumentPart;
                mainPart.Document.Save();
            }
        }
        catch
        {
        }
    }

现在如何查找某些文本并替换相同的文本？我无法通过链接,所以一些代码提示将是可观的.

与Linq to SQL一起使用时,FirstOrDefault()的默认行为是什么？

例如

  int value =   (from p in context.tableX         
                select p.Id).FirstOrDefault()      // Value will initialized here or

   if(value > 0)                      // query will be executed here????
   {
    //do something
   }

谢谢

我的存储过程中有一个nvarchar(MAX),它包含int值列表,我这样做是因为无法将int列表传递给我的存储过程,但是,现在我遇到问题,因为我的数据类型是int我想比较字符串列表.有没有办法可以做同样的事情？

---myquerry----where status in (@statuslist)

但是statuslist现在包含字符串值而不是int,那么如何将它们转换为INT？

更新:

USE [Database]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO


ALTER PROCEDURE [dbo].[SP]
(
@FromDate datetime = 0,
@ToDate datetime = 0,
@ID int=0,
@List nvarchar(MAX) //This is the List which has string ids//
)

AS SET FMTONLY OFF; DECLARE @sql nvarchar(MAX),@ paramlist nvarchar(MAX)

SET @sql    = 'SELECT ------ and Code in(@xList)
  and -------------'
SELECT @paramlist = '@xFromDate datetime,@xToDate datetime,@xId int,@xList nvarchar(MAX)'

EXEC sp_executesql @sql, @paramlist, 
@xFromDate = @FromDate ,@xToDate=@ToDate,@xId=@ID,@xList=@List …

这是我的代码,我正在尝试下载docx文件.但没有成功.在哪里我可能会滞后,需要一点点暗示.

if (File.Exists(sTempPath + sCreateFileName))
            {
                FileInfo file =new FileInfo(sTempPath + sCreateFileName);
                Response.ClearContent();
                // LINE1: Add the file name and attachment, which will force the open/cancel/save dialog to show, to the header
                Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
                // Add the file size into the response header
                Response.AddHeader("Content-Length", file.Length.ToString());
                // Set the ContentType                        
                Response.ContentType = ReturnExtension(file.Extension.ToLower());
                // Write the file into the response (TransmitFile is for ASP.NET 2.0. In ASP.NET 1.1 you have to use WriteFile instead)
                Response.TransmitFile(sTempPath + sCreateFileName);
                // …

我有一个像这样的元素数组:

messages[i],messages[i]可能只存在某些值的i.例如messages[0],messages[2]可能存在但不存在messages[1].

现在我想将具有连续索引的元素组合在一起,例如,如果存在消息的索引是:

2, 3, 4, 5, 8, 9, 12, 13, 14, 15, 16, 17, 20

我想像他们这样分组:

2, 3, 4, 5

8, 9

12, 13, 14, 15, 16, 17

20

使用Javascript这样做的有效方法是什么？

编辑:

for (i = 0; i < messages.length; i++) {
   if (messages[i].from_user_id == current_user_id) {
   // group the continuous messages together
      } else {
  //group these continuous messages together
   }
}

在下面的代码中，我试图通过鼠标滚轮缩放图像。但是代码不能正常工作，它只是刷新面板但没有调整它的大小。实际上，我正在从另一个称为解密的类创建的内存流中获取图像。完整图像显示正确，但我无法使用鼠标滚轮事件执行图像缩放。请帮助我。

private void Form2_Load(object sender, EventArgs e)
{
    this.Width = Screen.PrimaryScreen.WorkingArea.Width;
    this.Height = Screen.PrimaryScreen.WorkingArea.Height;
    this.CenterToScreen();
    PicturePanel= new PictureBox();

    PicturePanel.Dock = DockStyle.Fill;
    //PicturePanel.SizeMode = PictureBoxSizeMode.AutoSize;

    //PicturePanel.SizeMode = PictureBoxSizeMode.CenterImage;
    PicturePanel.Focus();
    //PicturePanel.MouseWheel += new System.Windows.Forms.MouseEventHandler(this.OnMouseWheel);
    this.Controls.Add(PicturePanel);


    View_codee v = new View_codee();

    try
    {
        PicturePanel.Image = Image.FromStream(Decrypt.ms1);
    }
    catch (Exception ee)
    {
        MessageBox.Show(ee.Message);
    }
    this.Name = "";
} 



protected override void OnMouseWheel(MouseEventArgs mea)
{
    // Override OnMouseWheel event, for zooming in/out with the scroll wheel
    if (PicturePanel.Image != null)
    {
        // If the mouse …