Question

private void button1_Click(object sender, EventArgs e)
{
   DataTable test = getDataFromXLS("c:\temp.xls");
   if (test != null)
   dataGridView1.DataSource = test;
}


private DataTable getDataFromXLS(string strFilePath)
{
   try
   {
      string strConnectionString = "";
      strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                                 "Data Source=" + strFilePath + "; Jet OLEDB:Engine Type=5;" + "Extended Properties=Excel 8.0;";
      OleDbConnection cnCSV = new OleDbConnection(strConnectionString);
      cnCSV.Open();
      OleDbCommand cmdSelect = new OleDbCommand(@"SELECT * FROM [Sheet1$]", cnCSV);
      OleDbDataAdapter daCSV = new OleDbDataAdapter(); daCSV.SelectCommand = cmdSelect;
      DataTable dtCSV = new DataTable();
      daCSV.Fill(dtCSV);
      cnCSV.Close();
      daCSV = null;
      return dtCSV;
  }
  catch (Exception ex)
  {
      return null;
  }
  finally
  {
  }
  }

我发现源代码将excel文件绑定到Internet上的winform应用程序上的DataGridView对象。但是，我想知道是否有其他方法可以执行此操作，而不是使用ADO-或任何SQL-related procedures，感谢您的帮助。

Answer 1

public void CreateDataTableForExcelData(String FileName) 
{
OleDbConnection ExcelConnection = null;
        string filePath = Server.MapPath(Request.ApplicationPath + "/UploadedFile/");
        DataTable dtNew = new DataTable();
        string strExt = "";
        strExt = FileName.Substring(FileName.LastIndexOf("."));
        if (strExt == ".xls")
        {
            ExcelConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + hdnFileName.Value + ";Extended Properties=Excel 8.0;");
        }
        else
        {
            if (strExt == ".xlsx")
            {
                ExcelConnection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + hdnFileName.Value + ";Extended Properties=Excel 12.0;");
            }
        }
        try
        {
            ExcelConnection.Open();
            DataTable dt = ExcelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
            OleDbCommand ExcelCommand = new OleDbCommand(@"SELECT * FROM [" + ddlTableName.SelectedValue + @"]", ExcelConnection);
            OleDbDataAdapter ExcelAdapter = new OleDbDataAdapter(ExcelCommand);
            DataSet ExcelDataSet = new DataSet();
            ExcelAdapter.Fill(dtExcel);
            ExcelConnection.Close();

        }
        catch (Exception ex)
        {

        }
        finally
        {
        }
}

Answer 2

您可以直接使用Excel COM Interop通过一些已经存在的包装器来使用Excel本身读取文件。但是我觉得你现在的做法很合理。

Answer 3

您展示的代码会将普通DataTable绑定到Excel文件。这意味着您可以以任何方式构建DataTable并将其绑定到excel文件。对ADO或程序没有依赖性或无论如何。

或许我只是不明白你的问题。

Answer 4

使用Ms-Office InterOp API。

Answer 5

你可以使用它（不要忘记引用Microsoft.Office.Interop.Excel。可能有一些额外的代码，因为我从我的工具中获取它，但总的想法是使用Excel COM）：

public ArrayList ProcessWorkbook(string filePath)
        {
            string file = filePath;

            Excel.Application excel = null;
            Excel.Workbook wkb = null;
            ArrayList al = new ArrayList();
            try
            {
                excel = new Excel.Application();

                wkb = ExcelTools.OpenBook(excel, file, false, true, false);

                Excel.Worksheet sheet = wkb.Sheets["Adresses"] as Excel.Worksheet;

                Excel.Range range = null;

                if (sheet != null)
                    range = sheet.get_Range("A1:X6702", Missing.Value);


                if (range != null)
                {
                    foreach (Excel.Range r in range)
                    {
                        al.Add(r.Text);
                    }
                }
            }
            catch (Exception ex)
            {
                //if you need to handle stuff
                Console.WriteLine(ex.Message);
            }
            finally
            {
                if (wkb != null)
                    ExcelTools.ReleaseRCM(wkb);

                if (excel != null)
                    ExcelTools.ReleaseRCM(excel);
            }
            return al;
        }

//----------------
    public static class ExcelTools
    {
        public static Excel.Workbook OpenBook(Excel.Application excelInstance, string fileName, bool readOnly, bool editable,
        bool updateLinks)
        {
            Excel.Workbook book = excelInstance.Workbooks.Open(
                fileName, updateLinks, readOnly,
                Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                Type.Missing, editable, Type.Missing, Type.Missing, Type.Missing,
                Type.Missing, Type.Missing);
            return book;
        }

        public static void ReleaseRCM(object o)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(o);
            }
            catch
            {
            }
            finally
            {
                o = null;
            }
        }
    }

在Datagridview中显示Excel文件内容

5 个答案: