//创建Excel对象
                    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                    excel.Application.Workbooks.Add(true);
                    //生成字段名称
                    for (int i = 0; i < dataGridView5.ColumnCount; i++)
                    {
                        excel.Cells[1, i + 1] = dataGridView5.Columns[i].HeaderText;
                    }
                    //填充数据
                    for (int i = 0; i < dataGridView5.RowCount - 1; i++)   //循环行
                    {
                        for (int j = 0; j < dataGridView5.ColumnCount; j++) //循环列
                        {
                            if (dataGridView5[j, i].ValueType == typeof(string))
                            {
                                excel.Cells[i + 2, j + 1] = "'" + dataGridView5.Rows[i].Cells[j].Value.ToString();
                            }
                            else
                            {
                                excel.Cells[i + 2, j + 1] = dataGridView5;
                            }
                        }
                        //设置禁止弹出保存和覆盖的询问提示框  
                        excel.Visible = false;
                        excel.DisplayAlerts = false;
                        excel.AlertBeforeOverwriting = false;
                        //保存到临时工作簿
                        //excel.Application.Workbooks.Add(true).Save();
                        //保存文件
                        excel.Save("D:" + "\\234.xls");
                        excel.Quit();

                    }

每次到这一句  excel.Application.Workbooks.Add(true);的时候，就弹错
无法将类型为“Microsoft.Office.Interop.Excel.ApplicationClass”的 COM 对象强制转换为接口类型“Microsoft.Office.Interop.Excel._Application”。此操作失败的原因是对 IID 为“{000208D5-0000-0000-C000-000000000046}”的接口的 COM 组件调用 QueryInterface 因以下错误而失败: 加载类型库/DLL 时出错。 (异常来自 HRESULT:0x80029C4A (TYPE_E_CANTLOADLIBRARY))。

哪位大神指点一下，感激不尽

[ 本帖最后由 xintuhai 于 2015-6-12 22:08 编辑 ]

我是要点击button按钮，然后导出成本地Excel

运行到这里的时候还是包同样的错误，怎么回事呢？大神