如何在C#中打开Excel文件？

Question

我试图将一些VBA代码转换为C#.我是C#的新手.目前我正在尝试从文件夹中打开Excel文件,如果它不存在则创建它.我正在尝试以下内容.我怎样才能使它工作？

Excel.Application objexcel;
Excel.Workbook wbexcel;
bool wbexists;
Excel.Worksheet objsht;
Excel.Range objrange;

objexcel = new Excel.Application();
if (Directory("C:\\csharp\\error report1.xls") = "")
{
    wbexcel.NewSheet();
}

else
{
    wbexcel.Open("C:\\csharp\\error report1.xls");
    objsht = ("sheet1");
}
objsht.Activate();

Answer 1

您需要安装Microsoft Visual Studio Tools for Office.

之后,创建常见的.NET项目,并Microsoft.Office.Interop.Excel通过"Add Reference .."对话框添加对COM对象的引用.

Application excel = new Application();
Workbook wb = excel.Workbooks.Open(path);

Missing.Value 是不必要的参数替换的特殊反射结构

Answer 2

FileInfo fi = new FileInfo("C:\\test\\report.xlsx");
if(fi.Exists)
{
    System.Diagnostics.Process.Start(@"C:\test\report.xlsx");
}
else
{
    //file doesn't exist
}

Answer 3

打开Excel文件

System.Diagnostics.Process.Start(@"c:\document.xls");

Answer 4

private void btnChoose2_Click(object sender, EventArgs e)
{
  OpenFileDialog openfileDialog1 = new OpenFileDialog();
  if (openfileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
  {
    this.btnChoose2.Text = openfileDialog1.FileName;
    String filename = DialogResult.ToString();

    var excelApp = new Excel.Application();
    excelApp.Visible = true;
    excelApp.Workbooks.Open(btnChoose2.Text);
  }
}