錯誤當出口數據網格視圖練成片

我在寡婦應用數據GridView和我添加按鈕導出數據到Excel工作表，但這些出現錯誤當出口數據網格視圖練成片

Cannot implicitly convert type 'object' to 'Microsoft.Office.Interop.Excel._Worksheet'. An explicit conversion exists (are you missing a cast?) here (worksheet = workbook.Sheets["Sheet1"];)

和此錯誤apeared（無重載方法「另存爲」需要 '11' 參數）這裏

workbook.SaveAs("c:\\output.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing)

，但此錯誤apeared

我的代碼：

Old format or invalid type library. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD) 
private void button1_Click(object sender, EventArgs e) 
{ 
    // creating Excel Application 
    Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application(); 
    // creating new WorkBook within Excel application 
    Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing); 
    // creating new Excelsheet in workbook 
    Microsoft.Office.Interop.Excel._Worksheet worksheet = null; 
    // see the excel sheet behind the program 
    app.Visible = true; 
    // get the reference of first sheet. By default its name is Sheet1. 
    // store its reference to worksheet 
    worksheet = workbook.Sheets["Sheet1"]; 
    worksheet = workbook.ActiveSheet; 
    // changing the name of active sheet 
    worksheet.Name = "Exported from gridview"; 

    // storing header part in Excel 

    for (int i = 1; i < DGData.Columns.Count + 1; i++) 
    { 
     worksheet.Cells[1, i] = DGData.Columns[i - 1].HeaderText; 
    } 
    // storing Each row and column value to excel sheet 

    for (int i = 0; i < DGData.Rows.Count - 1; i++) 
    { 
     for (int j = 0; j < DGData.Columns.Count; j++) 
     { 
      worksheet.Cells[i + 2, j + 1] = DGData.Rows[i].Cells[j].Value.ToString(); 
     } 
    } 
    // save the application 

    workbook.SaveAs("c:\\output.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing); 

    // Exit from the application 
    app.Quit(); 
    // storing Each row and column value to excel sheet 

    for (int i = 0; i < DGData.Rows.Count - 1; i++) 
    { 
     for (int j = 0; j < DGData.Columns.Count; j++) 
     { 
      worksheet.Cells[i + 2, j + 1] = DGData.Rows[i].Cells[j].Value.ToString(); 
     } 
    } 
}

來源

2011-03-03 Myworld

根據Microsoft的建議，出於法律和線程原因，您不應該使用Office Interop來從Web應用程序生成Excel。改用像http://epplus.codeplex.com/這樣的管理方式。 – jimmystormig 2011-03-03 10:48:39

不要忘了投，作爲workbook.Sheets []和workbook.ActiveSheet返回對象類型：

worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Sheets["Sheet1"]; 
worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.ActiveSheet;

而且你的另存爲方法需要一個addtional '缺失'：

workbook.SaveAs("c:\\output.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

至於「舊格式或無效類型庫」錯誤，請參閱this Microsoft article以獲得解決方法。

來源

2011-03-03 10:14:51

錯誤當出口數據網格視圖練成片

回答

相關問題