读写EXCEL的例子

   private   void  process1()
         {
            if (this.textBox_database.Text == "")
            {
                MessageBox.Show("请选择导入数据库！", "系统信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            if (this.textBox_moban.Text == "")
            {
                MessageBox.Show("请选择模版文件！", "系统信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            if (this.textBox_out.Text == "")
            {
                MessageBox.Show("请选择输出路径！", "系统信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            string str1 = "InterRoll";
            string str2 = "FileContent";
            this.readdata(this.textBox_database.Text, str1, "FileRollNo");//案卷题名数据库，以案卷号排序
            //this.readdata(this.textBox_database.Text, str2, "FileNo");//内容项数据库，以案卷号排序
            //遍历题名数据库
            int count1 = this.dataSet1.Tables[str1].Rows.Count;
            this.richTextBox1.SelectionColor = Color.Blue;
            this.richTextBox1.AppendText("案卷分目录生成开始：\n");

            if (Directory.Exists(this.textBox_out.Text))
            {
                Directory.CreateDirectory(this.textBox_out.Text);
            }

            for (int i = 0; i < count1; i++)
            {
                string[] head = new string[this.dataSet1.Tables[str1].Rows[i].ItemArray.Length];//案卷分目录题名
                for (int k = 0; k < this.dataSet1.Tables[str1].Rows[i].ItemArray.Length; k++)
                {
                    head[k] = this.dataSet1.Tables[str1].Rows[i].ItemArray[k].ToString();
                }
                string FileNo1 = head[1].Trim();

                string seach = "seach1";
                this.searchdata(this.textBox_database.Text, str2, " FileNo = '" + FileNo1 + "'", seach);

                int count2 = this.dataSet1.Tables[seach].Rows.Count;

                string fileName = this.textBox_moban.Text;
                if (count2 != 0)
                {
                    int finger = count2;//15行的循环计数标示
                    int line = 0;       //当前行
                    Excel.ApplicationClass excelApp = new Excel.ApplicationClass();

                    //Make Excel Visible
                    excelApp.Visible = false;
                    // excelApp.Visible = true;
                    Excel.Workbook workbook =
                        excelApp.Workbooks.Open(fileName,
                        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                        Type.Missing, Type.Missing);

                    Excel.Range range3;

                    int xx = 3;//excel文件的行列
                    int yy = 6;
                    object[,] array3;
                    int line_count = 15;
                FLAG:
                    if (finger > line_count)
                    {
                        array3 = new object[4, 8];
                        Excel._Worksheet worksheet = (Excel._Worksheet)workbook.Worksheets.get_Item(1);
                        range3 = worksheet.get_Range("A" + xx.ToString(), "H" + yy.ToString());
                        array3[0, 0] = "案卷题名";
                        array3[0, 1] = head[2];//案卷题名
                        array3[0, 4] = "档           号";
                        array3[0, 5] = "";//档号(案卷号)
                        array3[1, 4] = "编 制 日 期";
                        array3[1, 5] = head[3];//编制日期
                        array3[2, 4] = "保 管 期 限";
                        array3[2, 5] = "永久";
                        //array3[3, 4] = "共  xx  册    第  nn  册";
                        array3[3, 4] = "共  " + count1.ToString() + "  册    第  " + (i + 1).ToString() + "  册";
                        range3.Value2 = array3;

                        xx += 5;
                        yy += line_count + 1;
                        array3 = new object[line_count, 8];
                        worksheet = (Excel._Worksheet)workbook.Worksheets.get_Item(1);
                        range3 = worksheet.get_Range("A" + xx.ToString(), "H" + yy.ToString());

                        for (int mm = 0; mm < line_count; mm++)
                        {
                            for (int nn = 0; nn < 8; nn++)
                            {
                                array3[mm, nn] = "";
                            }
                        }
                        for (int mm = 0; mm < line_count; mm++)
                        {
                            /**//*
                      array3[0, 0] = "顺序号";
                      array3[0, 1] = "文 件  编 号";
                      array3[0, 2] = "责任者";
                      array3[0, 3] = "文    件    材    料    题    名";
                      array3[0, 5] = "日    期";
                      array3[0, 6] = "页      次";
                      array3[0, 7] = "备      注";
                     */

                            array3[mm, 0] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[2].ToString().Trim();
                            array3[mm, 1] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[3].ToString().Trim();
                            array3[mm, 2] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[4].ToString().Trim();
                            array3[mm, 3] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[5].ToString().Trim();
                            array3[mm, 5] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[6].ToString().Trim();
                            array3[mm, 6] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[7].ToString().Trim();
                            array3[mm, 7] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[8].ToString().Trim();
                        }
                        range3.Value2 = array3;
                        line += line_count;
                        finger -= line_count;
                        xx += 17;
                        yy += 6;
                        goto FLAG;
                    }
                    else
                    {
                        array3 = new object[4, 8];
                        Excel._Worksheet worksheet = (Excel._Worksheet)workbook.Worksheets.get_Item(1);
                        range3 = worksheet.get_Range("A" + xx.ToString(), "H" + yy.ToString());
                        array3[0, 0] = "案卷题名";
                        array3[0, 1] = head[2];//案卷题名
                        array3[0, 4] = "档           号";
                        array3[0, 5] = "";//档号(案卷号)
                        array3[1, 4] = "编 制 日 期";
                        array3[1, 5] = head[3];//编制日期
                        array3[2, 4] = "保 管 期 限";
                        array3[2, 5] = "永久";
                        //array3[3, 4] = "共  xx  册    第  nn  册";
                        array3[3, 4] = "共  " + count1.ToString() + "  册    第  " + (i + 1).ToString() + "  册";
                        range3.Value2 = array3;

                        xx += 5;
                        yy += line_count;
                        array3 = new object[line_count, 8];
                        worksheet = (Excel._Worksheet)workbook.Worksheets.get_Item(1);
                        range3 = worksheet.get_Range("A" + xx.ToString(), "H" + yy.ToString());

                        for (int mm = 0; mm < 15; mm++)
                        {
                            for (int nn = 0; nn < 8; nn++)
                            {
                                array3[mm, nn] = "";
                            }
                        }
                        for (int mm = 0; mm < finger; mm++)
                        {
                            array3[mm, 0] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[2].ToString().Trim();
                            array3[mm, 1] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[3].ToString().Trim();
                            array3[mm, 2] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[4].ToString().Trim();
                            array3[mm, 3] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[5].ToString().Trim();
                            array3[mm, 5] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[6].ToString().Trim();
                            array3[mm, 6] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[7].ToString().Trim();
                            array3[mm, 7] = this.dataSet1.Tables[seach].Rows[line + mm].ItemArray[8].ToString().Trim();
                        }
                        range3.Value2 = array3;
                        line += line_count;
                        finger = 0;

                        xx += 17;//表格指向最后一行
                        yy += 2;
                    }
                    //删除多余的表格,
                    Excel._Worksheet worksheet2 = (Excel._Worksheet)workbook.Worksheets.get_Item(1);
                    range3 = worksheet2.get_Range("A" + xx.ToString(), "H484");
                    //range3.Clear();
                    range3.Delete(Missing.Value);
                    //excel 2000/xp        
                    string savename = this.textBox_out.Text + "\\" + FileNo1 + ".xls";
                    if (File.Exists(savename))
                    {
                        File.Delete(savename);
                    }
                    workbook._SaveAs(savename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                       Excel.XlSaveAsAccessMode.xlNoChange,
                       Missing.Value, Missing.Value, Missing.Value, Missing.Value);

                    workbook.Saved = true;
                    workbook.Close(Missing.Value, Missing.Value, Missing.Value);

                    excelApp.UserControl = false;
                    excelApp.Quit();

                    this.richTextBox1.SelectionColor = Color.Green;
                    this.richTextBox1.AppendText("案卷号：" + FileNo1 + " 添加成功！\n");
                }
                else
                {
                    this.richTextBox1.SelectionColor = Color.Red;
                    this.richTextBox1.AppendText("案卷号：" + FileNo1 + " 对应的内容项不存在！\n");
                }

            }
            this.richTextBox1.SelectionColor = Color.Blue;
            this.richTextBox1.AppendText("案卷分目录生成成功！\n");
        }