小编KLI*_*M8D的帖子

我有一个页面,我想记录用户未能满足相关字段要求的每条验证消息.

问题是我的回发/按钮点击永远不会发生(可能是因为客户端验证),因此日志记录永远不会发生在用户实际获得每个字段之前(没有验证错误).

按钮单击事件方法:

protected void btnNext_Click(object sender, EventArgs e)
{
    Page.Validate();
    if(Page.IsValid)
    {
        //code
    }
    else
    {
        foreach (IValidator validator in Validators)
        {
            if (!validator.IsValid)
            {
                PageValidatorErrors error = new PageValidatorErrors
                              {
                                  WebsiteID = AppState.WebsiteID,
                                  Page = Request.Url.AbsolutePath,
                                  URL = Request.Url.ToString(),
                                  UserIP = Tools.GetIP(),
                                  ErrorMessage = validator.ErrorMessage,
                                  CreatedDate = DateTime.Now
                               };
                pageValidatorErrorsRep.insert(error);
            }
        }
    }
}

任何想法,我如何记录这些消息？

编辑:

<script type="text/javascript">
    function validatePage()
    {
        if (window.Page_IsValid != true)
        {
            //Page_Validators is an array of validation controls in the page. 
            if (window.Page_Validators …

我想将我的LINQ查询分组ItemNumber并返回整个表的总数Quantity.

Example:
ItemNumber - ItemName - Quantity
100          Item1       1
150          Item2       2
100          Item1       2
200          Item3       1
150          Item2       2

Should be:
ItemNumber - ItemName - Quantity
100          Item1       3
150          Item2       4
200          Item3       1

这是我试图分组的查询:

public IQueryable<WebsiteOrderStatus> GetOrderStatusByAccountNumberWithoutDeleted
        (string accountNumber)
{
    return db.WebsiteOrderStatus
             .Where(x => x.AccountNumber == accountNumber && x.LastUpdatedStatus != 1);
}

到目前为止我的最好结果(虽然这不能编译):

public IQueryable<IGrouping<Int32?, WebsiteOrderStatus>> lol(string accountNumber)
{
     db.WebsiteOrderStatus
       .Where(x => x.AccountNumber == accountNumber && x.LastUpdatedStatus != 1)
       .GroupBy(g => …

我正在尝试在Aforge中应用Bradleys阈值算法

每当我尝试处理图像时,我都会得到以下异常

抛出新的UnsupportedImageFormatException("过滤器不支持源像素格式.");

在应用算法之前,我使用以下方法对图像进行灰度级处理

private void button2_Click(object sender, EventArgs e)
{
    Grayscale filter = new Grayscale(0.2125, 0.7154, 0.0721);
    Bitmap grayImage = filter.Apply(img);

    pictureBox1.Image = grayImage;
}

算法调用的代码

public void bradley(ref Bitmap tmp)
{  
    BradleyLocalThresholding filter = new BradleyLocalThresholding();
    filter.ApplyInPlace(tmp);
}

我在图像处理实验室尝试了理智的图像,它确实有效,但不在我的系统上.

知道我做错了什么吗？

我正在尝试从我的网站上调用我的WCF服务上的POST方法.但是,WCF服务抱怨json字符串无效.

WCF服务方法:

[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, UriTemplate = "reserve/batteries", BodyStyle = WebMessageBodyStyle.Bare)]
public bool ReserveBatteries(ReserveModel values)

从网站调用POST的方法:

var stations = TempData["Stations"];
string jsonStations = JsonHelper.SerializeJson(stations);

HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create("http://localhost:49288/reserve/batteries");

UTF8Encoding encoding = new UTF8Encoding();
string postData = "{\"Stations\": " + jsonStations;
postData += ", \"User\": \"" + User.Identity.Name + "\" }";
byte[] data = encoding.GetBytes(postData);

httpWReq.Method = "POST";
httpWReq.ContentType = "application/json; charset=utf-8";
httpWReq.ContentLength = data.Length;

using (Stream stream = httpWReq.GetRequestStream())
{
      stream.Write(data, 0, data.Length);
} …

我不太确定这是否可能,所以这就是我问你们的原因.我想写一个方法,知道它之前是否已被访问过,如果它返回了它上次访问时的相同值.我不能为此使用字段/实例变量.

这是我想要做的,没有实例变量foo:

private FooObject foo = null;
public int setFoo(FooObject in)
{
    if(foo == null)
        foo = in;

    return foo.getX();
}

这可以吗？

我正在创建一个搜索成员的函数,我想添加一个where到我的searchResults变量.然而,在我能够这样做之前,它可能需要是一个IQueryable.

这就是我想要完成的事情:

var searchResults = listMembers.DataSource = members.getAllMembers().OrderByDescending(x => x.createdDate).Select(x => new
    {
        x.ID,
        x.memberNumber,
        x.name,
        x.email,
        x.birthDate,
        hasPayed = Helper.renderBoolImage(x.hasPayed, true),
        isConfirmed = Helper.renderBoolImage(x.isConfirmed, true),
        isExportedToExcel = Helper.renderBoolImage(x.isExportedToExcel, true)
    });

    if (!String.IsNullOrEmpty(search.name))
    {
        searchResults = searchResults.Where(x => x.name.ToLower().Equals(enc(search.name.ToLower())));
    }

这行不会编译,因为它无法解析Where:

searchResults = searchResults.Where(x => x.name.ToLower().Equals(enc(search.name.ToLower())));

我想在我的数据库中找到一个用户,搜索电子邮件和电话号码.但是,如果我使用List或IEnumerable,我会得到一个空的refence异常.如果我不使用任何这些,则抛出"不支持SQL ...".

我的方法:

public List<tblMember> getAllMembers()
{
    return db.tblMembers.ToList();
}

private void confirmMembership(string email, int phoneNumber)
{
    //var allMembers = db.tblMembers.AsEnumerable(); throws same exception
    tblMember member = getAllMembers().FirstOrDefault(x => x.email.Equals(email, StringComparison.OrdinalIgnoreCase) && x.phoneNumber == phoneNumber); //This line throws exception, around email.Equals()
    if (member != null)
    {
        member.isConfirmed = true;
        db.SubmitChanges();
    }
    else
        throw new Exception("Member not found");
}

如果我执行这样的搜索,则不会抛出异常:

private void confirmMembership(string email, int phoneNumber)
{
    //var allMembers = db.tblMembers.AsEnumerable(); throws same exception
    tblMember member = getAllMembers().FirstOrDefault(x => x.email == …