使用 NuGet 下载包后程序集未加载

Question

我创建了一个新的网络项目。使用 NuGet 包添加 EPPlus 库，然后从 codeplex EPPlus 页面添加以下代码。

    FileInfo newFile = new FileInfo(@"c:\sample1.xlsx");
    if (newFile.Exists)
    {
        newFile.Delete();  // ensures we create a new workbook
        newFile = new FileInfo(@"c:\sample1.xlsx");
    }
    using (ExcelPackage package = new ExcelPackage(newFile))
    {
        // add a new worksheet to the empty workbook
        ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Inventory");
        //Add the headers
        worksheet.Cells[1, 1].Value = "ID";
        worksheet.Cells[1, 2].Value = "Product";
        worksheet.Cells[1, 3].Value = "Quantity";
        worksheet.Cells[1, 4].Value = "Price";
        worksheet.Cells[1, 5].Value = "Value";

        //Add some items...
        worksheet.Cells["A2"].Value = 12001;
        worksheet.Cells["B2"].Value = "Nails";
        worksheet.Cells["C2"].Value = 37;
        worksheet.Cells["D2"].Value = 3.99;

        worksheet.Cells["A3"].Value = 12002;
        worksheet.Cells["B3"].Value = "Hammer";
        worksheet.Cells["C3"].Value = 5;
        worksheet.Cells["D3"].Value = 12.10;

        worksheet.Cells["A4"].Value = 12003;
        worksheet.Cells["B4"].Value = "Saw";
        worksheet.Cells["C4"].Value = 12;
        worksheet.Cells["D4"].Value = 15.37;

        //Add a formula for the value-column
        worksheet.Cells["E2:E4"].Formula = "C2*D2";

        //Ok now format the values;
        using (var range = worksheet.Cells[1, 1, 1, 5])
        {
            range.Style.Font.Bold = true;
            range.Style.Fill.PatternType = ExcelFillStyle.Solid;
            range.Style.Fill.BackgroundColor.SetColor(Color.DarkBlue);
            range.Style.Font.Color.SetColor(Color.White);
        }

        worksheet.Cells["A5:E5"].Style.Border.Top.Style = ExcelBorderStyle.Thin;
        worksheet.Cells["A5:E5"].Style.Font.Bold = true;

        worksheet.Cells[5, 3, 5, 5].Formula = string.Format("SUBTOTAL(9,{0})", new ExcelAddress(2, 3, 4, 3).Address);
        worksheet.Cells["C2:C5"].Style.Numberformat.Format = "#,##0";
        worksheet.Cells["D2:E5"].Style.Numberformat.Format = "#,##0.00";

        //Create an autofilter for the range
        worksheet.Cells["A1:E4"].AutoFilter = true;

        worksheet.Cells["A2:A4"].Style.Numberformat.Format = "@";   //Format as text
        worksheet.Cells.AutoFitColumns(0);  //Autofit columns for all cells

        // lets set the header text 
        worksheet.HeaderFooter.OddHeader.CenteredText = "&24&U&\"Arial,Regular Bold\" Inventory";
        // add the page number to the footer plus the total number of pages
        worksheet.HeaderFooter.OddFooter.RightAlignedText =
            string.Format("Page {0} of {1}", ExcelHeaderFooter.PageNumber, ExcelHeaderFooter.NumberOfPages);
        // add the sheet name to the footer
        worksheet.HeaderFooter.OddFooter.CenteredText = ExcelHeaderFooter.SheetName;
        // add the file path to the footer
        worksheet.HeaderFooter.OddFooter.LeftAlignedText = ExcelHeaderFooter.FilePath + ExcelHeaderFooter.FileName;

        worksheet.PrinterSettings.RepeatRows = worksheet.Cells["1:2"];
        worksheet.PrinterSettings.RepeatColumns = worksheet.Cells["A:G"];

        // Change the sheet view to show it in page layout mode
        worksheet.View.PageLayoutView = true;

        // set some document properties
        package.Workbook.Properties.Title = "Invertory";
        package.Workbook.Properties.Author = "Jan Källman";
        package.Workbook.Properties.Comments = "This sample demonstrates how to create an Excel 2007 workbook using EPPlus";

        // set some extended property values
        package.Workbook.Properties.Company = "AdventureWorks Inc.";

        // set some custom property values
        package.Workbook.Properties.SetCustomPropertyValue("Checked by", "Jan Källman");
        package.Workbook.Properties.SetCustomPropertyValue("AssemblyName", "EPPlus");
        // save our new workbook and we are done!
        package.Save();

    }

问题：执行此代码后出现以下错误：

这是我的 csproj 文件中 EPPLus 的条目：

错误的 ..\packages\EPPlus.3.1.3.3\lib\net35\EPPlus.dll

这是 packages.config 的外观：

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="EPPlus" version="3.1.3.3" targetFramework="net35" />
</packages>

无法加载文件或程序集 'EPPlus，版本 = 3.0.0.2， Culture=neutral, PublicKeyToken=ea159fdaa78159a1' 或其之一 依赖项。定位程序集的清单定义不 匹配程序集引用。 （HRESULT 异常：0x80131040）

我不确定，我该怎么办？？请帮忙。

谢谢

Answer 1

无论听起来多么愚蠢，但我犯的错误是，我将解决方案命名为 EPPlus，并且系统在加载 DLL 时感到困惑:(。我创建了另一个以“xyz”为名称的解决方案，并且能够创建文件。

谢谢大家的帮助。

Answer 2

需要注意的一点是，异常告诉您，您的程序正在寻找与您在项目和包文件中安装和引用的版本不同的版本。

我怀疑问题是 CopyLocal 设置为 False 而应该设置为 True.

在 Visual Studio 中，打开项目的引用，选择 EPPlus 并显示其属性。确保 Copy Local 设置为 True.