【进度条】进度条在.net导入Excel时的应用实例-net--导入-Excel-应用

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进度条在.net导入Excel时的应用实例

//1.这里为了简便，我只写出了前端页面中的body体部分供参考：
<form id="forms" runat="server">
<table align="center" style="height:100%">
    <tr style="height:45%"><td></td></tr>
<tr>
       <td align="center" style="height: 24px; width: 100px;"> Excel文件</td>
       <td style="height: 24px">
       <asp:FileUpload ID="fuGlossaryXls" runat="server"/>
       <asp:Label ID="Label2" runat="server" Font-Bold="True" ForeColor="Red" Text="不能为空"
                                                    Visible="False"></asp:Label></td>
                                                    <td>
        <asp:Button ID="Button1" runat="server" CssClass="mybotton" Text="导入" Width="60px" onclick="Button1_Click"/></td>
</tr>
</table>
</form>
//2.后端部分代码如下：
 //这里是激发导入按钮点击事件
        protected void Button1_Click(object sender, EventArgs e)
        {
            string cfilename=this.fuGlossaryXls.FileName;//获取准备导入的文件名称
            if (cfilename=="")
            {
                Label2.Visible=true;
                return;
            }
            else
            {
                Label2.Visible=false;
            }
            //////////////显示进度/////////////////////////////////////////////////////////////////////////////
            DateTime startTime=System.DateTime.Now;
            DateTime endTime=System.DateTime.Now;

            // 根据 ProgressBar.htm 显示进度条界面
            string templateFileName=Path.Combine(Server.MapPath("."), "ProgressBar.htm");
            StreamReader reader=new StreamReader(@templateFileName, System.Text.Encoding.GetEncoding("gb2312"));
            string html=reader.ReadToEnd();
            reader.Close();
            Response.Write(html);
            Response.Flush();
            System.Threading.Thread.Sleep(1000);

            string jsBlock;
            // 处理完成
            jsBlock="<script>BeginTrans('正在加载数据，请耐心等待...');</script>";
            Response.Write(jsBlock);
            Response.Flush();

             string fileName=fuGlossaryXls.PostedFile.FileName.Substring(fuGlossaryXls.PostedFile.FileName.LastIndexOf("\\") + 1);//获取准备导入文件的文件名
             string suffix=fileName.Substring(fileName.LastIndexOf(".") + 1);//获取准备导入文件的后缀名
            
             System.Threading.Thread.Sleep(200);

             int maxrows=0;//用来记录需要加载的数据总行数
             bool err=false;//用来记录加载状态
             int errcount=0;//用来记录加载错误行数
             if (fuGlossaryXls.HasFile)//判断当前是否有选取文件
             {
                 if (suffix=="xlsx")
                 {
                     DataTable dt=ExcelImport(fileName);
                     for (int i=0; i < dt.Rows.Count; i++)
                     {
                         maxrows++;
                     }
                     //////////拓展////////////////////////////////////////////////////////
                     //DataView myView=new DataView(dt);
                     //myView.RowFilter="name is not null";
                     //int t=myView.Count;//获取满足RowFilter 条件的数据行
                     //////////拓展////////////////////////////////////////////////////////
                     string sqlconnect="Data Source=.;Initial Catalog=test;User ID=sa;Password=123456;";//本地数据库链接
                     SqlConnection conn=new SqlConnection(sqlconnect);
                     SqlTransaction myTrans=null;
                     try
                     {
                         SqlCommand cmd=new SqlCommand(null, conn);
                         conn.Open();
                         myTrans=conn.BeginTransaction();
                         cmd.Transaction=myTrans;
                         cmd.CommandText="delete from test";
                         cmd.ExecuteNonQuery();//首先执行清除表内容操作
                         for (int j=0; j < dt.Rows.Count; j++)//循环向数据库中插入excel数据
                         {
                             if (string.IsNullOrEmpty(dt.Rows[j][0].ToString()))
                             {
                                 jsBlock="<script>EndTrans('第" + j.ToString() + "行数据写入错误。');</script>";
                                 Response.Write(jsBlock);
                                 Response.Flush();
                                 err=true;
                                 errcount++;
                             }
                             else
                             {
                                 cmd.CommandText=string.Format("insert into test values('{0}','{1}','{2}','{3}')", dt.Rows[j][0], dt.Rows[j][1], dt.Rows[j][2], dt.Rows[j][3]);
                                 cmd.ExecuteNonQuery();//逐行向表中插入数据，注意字段的对应
                             }
                             System.Threading.Thread.Sleep(1000);
                             float cposf=0;
                             cposf=100 * (j + 1) / maxrows;
                             int cpos=(int)cposf;
                             jsBlock="<script>SetPorgressBar('已加载到第" + (j + 1).ToString() + "条','" + cpos.ToString() + "');</script>";
                             Response.Write(jsBlock);
                             Response.Flush();
                         }
                         myTrans.Commit();//提交
                     }
                     catch (Exception ex)
                     {
                         myTrans.Rollback();//回滚
                         ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('" + ex.Message + "');</script>");
                     }
                     finally
                     {
                         conn.Dispose();
                         conn.Close();//关闭数据库连接
                     }
                 }
                 else
                 {
                     ClientScript.RegisterStartupScript(GetType(), "", "alert('请选择Excel文件!');", true);
                 }
             }
             else
             {
                 ClientScript.RegisterStartupScript(GetType(), "", "alert('请选择要导入的Excel!');", true);
             }
             if (!err)//加载中并没有出现错误
             {
                 // 处理完成
                 jsBlock="<script>EndTrans('处理完成。');</script>";
                 Response.Write(jsBlock);
                 Response.Flush();
             }
             else
             {
                 jsBlock="<script>EndTrans('共有"+maxrows.ToString()+"条数据需要加载，其中 有"+errcount.ToString()+"条数据录入错误！');</script>";
                 Response.Write(jsBlock);
                 Response.Flush();
             }
             System.Threading.Thread.Sleep(1000);

             endTime=DateTime.Now;//录入完成所用时间
             TimeSpan ts1=new TimeSpan(startTime.Ticks);
             TimeSpan ts2=new TimeSpan(endTime.Ticks);
             TimeSpan ts=ts2.Subtract(ts1).Duration(); //取开始时间和结束时间两个时间差的绝对值
             String spanTime=ts.Hours.ToString() + "小时" + ts.Minutes.ToString() + "分" + ts.Seconds.ToString() + "秒";
             jsBlock="<script>SetTimeInfo('加载完成，共用时" + spanTime + "');</script>";
             Response.Write(jsBlock);
             Response.Flush();

        }
        public DataTable ExcelImport(string fileName) //建立Excel表链接，返回Excel表数据
        {
                //EXCEL 的连接串
                string sConnectionString="Provider=Microsoft.ACE.OLEDB.12.0;" +
                "Data Source=C:\\Documents and Settings\\Administrator\\桌面\\" + fileName + ";" +
                "Extended Properties='Excel 8.0;IMEX=1';";
                //string sConnectionString="Microsoft.ACE.OLEDB.4.0;" +
                //"Data Source=C:\\Documents and Settings\\Administrator\\桌面\\" + fileName + ";" +
                //"Extended Properties='Excel 8.0;IMEX=1';";
                OleDbConnection objConn=new OleDbConnection(sConnectionString);//建立EXCEL的连接

//说明：程序运行到这里的时候有时会出错“未在本地计算机上注册“Microsoft.ACE.OLEDB.12.0”提供程序”，此时大多数情况下我们只需要去http://download.microsoft.com/download/7/0/3/703ffbcb-dc0c-4e19-b0da-1463960fdcdb/AccessDatabaseEngine.exe下载一个AccessDatabaseEngine.exe安装即可，原因在于你的office没有安装ACCESS组件
                objConn.Open();
                OleDbCommand objCmdSelect=new OleDbCommand("SELECT * FROM [Sheet1$]", objConn);
                OleDbDataAdapter objAdapter1=new OleDbDataAdapter();
                objAdapter1.SelectCommand=objCmdSelect;
                DataSet objDataset1=new DataSet();
                objAdapter1.Fill(objDataset1, "XLData");
                DataTable dt=objDataset1.Tables[0];
                //DataView myView=new DataView(dt);
                objConn.Close();//关闭EXCEL的连接
                return dt;
}

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