Excel導入使用C＃

Question

我正在使用c＃中的DataTable在excel導入到網格視圖的工作中，但是我的問題是它在我的本地系統上工作正常，但是它重定向到我的在線服務器上的登錄頁面，並且我已經嘗試了Microsoft.Office.Interop.Excel和OLEdb連接。 但是問題是一樣的。 請告訴我這些是什么問題，或者任何一個具有在GridView中導入Excel數據的其他功能。

private void processExcel(string filename)
{
    filename = Server.MapPath("~/Files/WM-0b23-productsBook.xlsx");
    Microsoft.Office.Interop.Excel.Application xlApp;
    Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
    Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;

    var missing = System.Reflection.Missing.Value;

    xlApp = new Microsoft.Office.Interop.Excel.Application();
    xlWorkBook = xlApp.Workbooks.Open(filename, false, true, missing, missing, missing, true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, '\t', false, false, 0, false, true, 0);
    xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

    Microsoft.Office.Interop.Excel.Range xlRange = xlWorkSheet.UsedRange;
    Array myValues = (Array)xlRange.Cells.Value2;

    int vertical = myValues.GetLength(0);
    int horizontal = myValues.GetLength(1);

    System.Data.DataTable dt = new System.Data.DataTable();

    // must start with index = 1
    // get header information
    for (int i = 1; i <= horizontal; i++)
    {
        dt.Columns.Add(new DataColumn(myValues.GetValue(1, i).ToString()));
    }

    // Get the row information
    for (int a = 2; a <= vertical; a++)
    {
        object[] poop = new object[horizontal];
        for (int b = 1; b <= horizontal; b++)
        {
            poop[b - 1] = myValues.GetValue(a, b);
        }
        DataRow row = dt.NewRow();
        row.ItemArray = poop;
        dt.Rows.Add(row);
    }

    // assign table to default data grid view
    GridView1.DataSource = dt;
    GridView1.DataBind();

    xlWorkBook.Close(true, missing, missing);
    xlApp.Quit();

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

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

看一看：

private void processExcel(string filename)
    {
        filename = Server.MapPath("~/Files/WM-0b23-productsBook.xlsx");
        Microsoft.Office.Interop.Excel.Application xlApp;
        Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
        Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
    var missing = System.Reflection.Missing.Value;

    xlApp = new Microsoft.Office.Interop.Excel.Application();
    xlWorkBook = xlApp.Workbooks.Open(filename, false, true, missing, missing, missing, true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, '\t', false, false, 0, false, true, 0);
    xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

    Microsoft.Office.Interop.Excel.Range xlRange = xlWorkSheet.UsedRange;
    Array myValues = (Array)xlRange.Cells.Value2;

    int vertical = myValues.GetLength(0);
    int horizontal = myValues.GetLength(1);

    System.Data.DataTable dt = new System.Data.DataTable();

    // must start with index = 1
    // get header information
    for (int i = 1; i <= horizontal; i++)
    {
        dt.Columns.Add(new DataColumn(myValues.GetValue(1, i).ToString()));
    }

    // Get the row information
    for (int a = 2; a <= vertical; a++)
    {
        object[] poop = new object[horizontal];
        for (int b = 1; b <= horizontal; b++)
        {
            poop[b - 1] = myValues.GetValue(a, b);
        }
        DataRow row = dt.NewRow();
        row.ItemArray = poop;
        dt.Rows.Add(row);
    }

    // assign table to default data grid view
    GridView1.DataSource = dt;
    GridView1.DataBind();

    xlWorkBook.Close(true, missing, missing);
    xlApp.Quit();

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

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 2

最好不要在服務器情況下使用MS Office互操作，否則將來會帶來很多性能和內存問題。 推薦使用一些第三方庫，例如： https : //www.nuget.org/packages/Spread.Services/以獲取所需內容。