无法嵌入.请改用适用的界面

Question

我正在尝试将照片添加到Excel Spread表但仍然收到以下错误？

错误1无法嵌入互操作类型"Microsoft.Office.Interop.Excel.ApplicationClass".请改用适用的界面.

ApplicationClass(); 在下面的代码行中以红色加下划线:

xlApp = new Excel.ApplicationClass();

有人可以告诉我如何解决这个问题？

using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.Office.Core;

private void btnWriteSpreedSheet_Click(object sender, EventArgs e)
        {
            Excel.Application xlApp;
            Excel.Workbook xlWorkBook;
            Excel.Worksheet xlWorkSheet;
            object misValue = System.Reflection.Missing.Value;

            xlApp = new Excel.ApplicationClass(); //This is where the problem is??????
            xlWorkBook = xlApp.Workbooks.Add(misValue);
            xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

            //add some text 
            xlWorkSheet.Cells[1, 1] = "http://csharp.net-informations.com";
            xlWorkSheet.Cells[2, 1] = "Adding picture in Excel File";

            xlWorkSheet.Shapes.AddPicture("C:\\csharp-xl-picture.JPG", Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoCTrue, 50, 50, 300, 45);

              xlWorkBook.SaveAs("csharp.net-informations.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
            xlWorkBook.Close(true, misValue, misValue);
            xlApp.Quit();

            releaseObject(xlApp);
            releaseObject(xlWorkBook);
            releaseObject(xlWorkSheet);

            MessageBox.Show ("File created !");
        }

        private void releaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
                MessageBox.Show("Unable to release the Object " + ex.ToString());
            }
            finally
            {
                GC.Collect();
            }
        } 

    }

Answer 1

在您的项目中,展开"引用",找到Microsoft Office Interop引用.右键单击它并选择属性,然后将"嵌入互操作类型"更改为false.

Answer 2

正如MSDN博客文章中所解释的那样,您也可以更改"禁用互操作类型",而不是禁用"嵌入互操作类型"

xlApp = new Excel.ApplicationClass();

成

xlApp = new Excel.Application();

虽然Excel.Application是一个接口,但我们可以实例化它,因为它使用CoClass属性进行修饰,如其他SO答案所述:https://stackoverflow.com/a/11039870/501196

使用此方法(Embed Interop Types = true)的优势在于,您需要在项目中部署较少的文件,嵌入式类型将仅包含应用程序实际使用的方法和类型.使用外部互操作程序集时,将导入引用库公开的所有类型和方法.