小编Kri*_*aes的帖子

有人知道如何使用C#在ASP.NET中正确识别CMYK图像吗？当我检查实例的Flags属性时Bitmap,我得到的结果不正确.

我已经创建了三个图像来测试它:cmyk.jpg,rgb.jpg和gray.jpg.这些分别是CMYK,RGB和灰度图像.

这是我的测试代码:

static void Main(string[] args)
{
    Bitmap bmpCMYK = new Bitmap("cmyk.jpg");
    Bitmap bmpRGB = new Bitmap("rgb.jpg");
    Bitmap bmpGray = new Bitmap("gray.jpg");

    Console.WriteLine("\t\tRgb\tCmyk\tGray\tYcbcr\tYcck\tPixelFormat");

    Console.WriteLine("cmyk.jpg\t{0}\t{1}\t{2}\t{3}\t{4}\t{5}",
        IsSet(bmpCMYK, System.Drawing.Imaging.ImageFlags.ColorSpaceRgb),
        IsSet(bmpCMYK, System.Drawing.Imaging.ImageFlags.ColorSpaceCmyk),
        IsSet(bmpCMYK, System.Drawing.Imaging.ImageFlags.ColorSpaceGray),
        IsSet(bmpCMYK, System.Drawing.Imaging.ImageFlags.ColorSpaceYcbcr),
        IsSet(bmpCMYK, System.Drawing.Imaging.ImageFlags.ColorSpaceYcck),
        bmpCMYK.PixelFormat);

    Console.WriteLine("rgb.jpg\t\t{0}\t{1}\t{2}\t{3}\t{4}\t{5}",
        IsSet(bmpRGB, System.Drawing.Imaging.ImageFlags.ColorSpaceRgb),
        IsSet(bmpRGB, System.Drawing.Imaging.ImageFlags.ColorSpaceCmyk),
        IsSet(bmpRGB, System.Drawing.Imaging.ImageFlags.ColorSpaceGray),
        IsSet(bmpRGB, System.Drawing.Imaging.ImageFlags.ColorSpaceYcbcr),
        IsSet(bmpRGB, System.Drawing.Imaging.ImageFlags.ColorSpaceYcck),
        bmpRGB.PixelFormat);

    Console.WriteLine("gray.jpg\t{0}\t{1}\t{2}\t{3}\t{4}\t{5}",
        IsSet(bmpGray, System.Drawing.Imaging.ImageFlags.ColorSpaceRgb),
        IsSet(bmpGray, System.Drawing.Imaging.ImageFlags.ColorSpaceCmyk),
        IsSet(bmpGray, System.Drawing.Imaging.ImageFlags.ColorSpaceGray),
        IsSet(bmpGray, System.Drawing.Imaging.ImageFlags.ColorSpaceYcbcr),
        IsSet(bmpGray, System.Drawing.Imaging.ImageFlags.ColorSpaceYcck),
        bmpGray.PixelFormat);

    bmpCMYK.Dispose();
    bmpRGB.Dispose();
    bmpGray.Dispose();

    Console.ReadLine();
}

private static bool IsSet(Bitmap bitmap, System.Drawing.Imaging.ImageFlags flag)
{
    return (bitmap.Flags & …

我正在使用Entity Framework 4.3 Code First和一个自定义数据库初始化程序,如下所示:

public class MyContext : DbContext
{
    public MyContext()
    {
        Database.SetInitializer(new MyContextInitializer());
    }
}

public class MyContextInitializer : CreateDatabaseIfNotExists<MyContext>
{
    protected override void Seed(MyContext context)
    {
        // Add defaults to certain tables in the database

        base.Seed(context);
    }
}

每当我的模型发生变化时,我都会手动编辑POCO和映射,并手动更新数据库.

当我再次运行我的应用程序时,我收到此错误:

'/'应用程序中的服务器错误.

自创建数据库以来,支持"MyContext"上下文的模型已更改.请考虑使用"代码优先迁移"来更新数据库(http://go.microsoft.com/fwlink/?LinkId=238269).

描述:执行当前Web请求期间发生未处理的异常.请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息.

异常详细信息: System.InvalidOperationException:自创建数据库以来,支持"MyContext"上下文的模型已更改.请考虑使用"代码优先迁移"来更新数据库(http://go.microsoft.com/fwlink/?LinkId=238269).

使用EFProfiler,我还注意到这些查询正在执行:

-- statement #1
SELECT [GroupBy1].[A1] AS [C1]
FROM   (SELECT COUNT(1) AS [A1]
        FROM   [dbo].[__MigrationHistory] AS [Extent1]) AS [GroupBy1]

-- statement #2
SELECT TOP (1) [Project1].[C1]          AS [C1],
               [Project1].[MigrationId] AS …

我在MVC3中使用KendoUI MVC.

我设法在网格列中获得一个下拉列表.但我不知道如何设置所选值,当我保存它时不保存我选择的值.

网格

@using Perseus.Areas.Communication.Models
@using Perseus.Common.BusinessEntities;


<div class="gridWrapper">
    @(Html.Kendo().Grid<CommunicationModel>()
        .Name("grid")
        .Columns(colums =>
        {
            colums.Bound(o => o.communication_type_id)
                .EditorTemplateName("_communicationDropDown")
                .ClientTemplate("#: communication_type #")
                .Title("Type")
                .Width(180);
            colums.Bound(o => o.sequence).Width(180);
            colums.Bound(o => o.remarks);
            colums.Command(command => command.Edit()).Width(50);
        })
        .Pageable()
        .Sortable()
        .Filterable()
        .Groupable()
        .Editable(edit => edit.Mode(GridEditMode.InLine))
        .DataSource(dataSource => dataSource
            .Ajax()
            .ServerOperation(false)
            .Model(model => model.Id(o => o.communication_id))
                .Read(read => read.Action("AjaxBinding", "Communication", new { id = @ViewBag.addressId }))
                .Update(update => update.Action("Update", "Communication"))
            .Sort(sort => { sort.Add(o => o.sequence).Ascending(); })
            .PageSize(20)
        )
    )
</div>

EditorTemplate"_communicationDropDown

@model Perseus.Areas.Communication.Models.CommunicationModel


@(Html.Kendo().DropDownListFor(c …