在ASP.NET中將Excel檔案中資料匯入資料庫並顯示進度條
在ASP.NET中經常會遇到Excel檔案匯入資料庫的問題，遇到資料量比較大的時候，最好顯示進度條。
進度條設計是參考網上某牛人提供的程式碼，利用JS實現的，謝謝這個大牛了（忘記了當時記錄下他的大名了，:(）。具體思路：首先將後臺伺服器上ProgressBar.htm 頁面內容（其中有html和js程式碼）完全讀取出來，並write到前臺。然後在資料匯入前，新增js呼叫，如下：
jsBlock = "<script>BeginTrans('開始處理...');</script>";
Response.Write(jsBlock);
Response.Flush();
其次，在處理每條資料匯入的過程中，新增如下js呼叫：
System.Threading.Thread.Sleep(20);
float cposf = 0;
cposf = 100 * i / maxrows;
int cpos = (int)cposf;
jsBlock = "<script>SetPorgressBar('" + "第" + i.ToString() + "條','" + cpos.ToString() + "');</script>";
Response.Write(jsBlock);
Response.Flush();
*******************************************************
以下是完整的實現過程......
前臺.aspx部分程式碼：
<tr>
<td align="center" style="height: 25px; width: 100px;">父分類</td>
<td valign="middle" style="height: 25px">
<asp:TextBox ID="tbParent" runat="server" CssClass="textinput" Text="" Width="150px"></asp:TextBox>
<asp:TextBox ID="tbParentId" runat="server" CssClass="textinput" Text=""Width="19px" ></asp:TextBox>
<asp:Label ID="Label1" runat="server" Font-Bold="True" ForeColor="Red" Text="不能為空"
Visible="False"></asp:Label></td>
</tr>
<tr>
<td align="center" style="height: 24px; width: 100px;"> Excel檔案</td>
<td style="height: 24px">
<asp:FileUpload ID="fuGlossaryXls" runat="server" />
<asp:Label ID="Label2" runat="server" Font-Bold="True" ForeColor="Red" Text="不能為空"
Visible="False"></asp:Label></td>
</tr>
... ... ...
<asp:Button ID="btnImport" runat="server" CssClass="mybotton" Text="導 入" Width="60px" OnClick="btnImport_Click" ></asp:Button>
以下是在FileUpload控制元件中，選擇了相應檔案後點擊“匯入”.aspx.cs檔案中響應事件。
protected void btnImport_Click(object sender, EventArgs e)
{
string cparentname = this.tbParent.Text.Trim();
string cparentid = this.tbParentId.Text.Trim();
if (cparentname == "")
{
Label1.Visible = true;
return;
}
else
{
Label1.Visible = false;
}
string cfilename = this.fuGlossaryXls.FileName;
if (cfilename == "")
{
Label2.Visible = true;
return;
}
else
{
Label2.Visible = false;
}
//////////////首先將檔案上傳到伺服器///////////////////////////////////////////////////////////
string tempfilename = Guid.NewGuid().ToString();
String filepath = System.Configuration.ConfigurationSettings.AppSettings["SaveFilePath"] + tempfilename + ".xls";
try
{
fuGlossaryXls.SaveAs(filepath);
}
catch (Exception ex)
{
//Response.Write("<script>alert('資料檔案上傳出錯！')</script>");
Response.Write(ex.Message);
return;
}
//////////////檔案上傳到伺服器////////////////////////////////////////////////////////////
//////////////顯示進度/////////////////////////////////////////////////////////////////////////////
DateTime startTime = System.DateTime.Now;
DateTime endTime = System.DateTime.Now;
// 根據 ProgressBar.htm 顯示進度條介面
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;
// 處理完成
jsBlock = "<script>BeginTrans('開始處理...');</script>";
Response.Write(jsBlock);
Response.Flush();
///--------------------------------------------------
object missing = Missing.Value;
DateTime beforeTime;
DateTime afterTime;
beforeTime = DateTime.Now;
Excel.Application cexcelapp = new Excel.Application();
cexcelapp.Visible = false;
afterTime = DateTime.Now;
Excel.Workbook workBook = cexcelapp.Workbooks.Open(filepath, missing, missing, missing, missing, missing,
missing, missing, missing, missing, missing, missing, missing, missing, missing);
//得到WorkSheet物件
Excel.Worksheet sheet = (Excel.Worksheet)workBook.Worksheets.get_Item(1);
int maxrows = 0;
int maxcolumns = 0;
maxrows = sheet.UsedRange.Rows.Count;
maxcolumns = sheet.UsedRange.Columns.Count;
///--------------------------------------------------
System.Threading.Thread.Sleep(200);
bool err = false;
// 根據處理任務處理情況更新進度條
for (int i = 1; i <= maxrows; i++)
{
///-------------處理-------------------------------------
Range curentCell = (Range)sheet.Cells[i, 1];
string cvalue = curentCell.Text.ToString().Trim();
if (cvalue != "")
{
//bool exist = CommFun.DataItemExistCheck("GLOSSARY", "NODE_NAME", cvalue);
string cwherestr = " parent_id = '" + cparentid + "'";
bool exist = CommFun.DataItemExistCheck("GLOSSARY", "NODE_NAME", cvalue, cwherestr);
if (!exist)
{
string newnodeid = Glossary.GetNewnodeId(cparentid);
int subresult = Glossary.AddNode(newnodeid, cvalue, cparentid);
if (subresult != 0)
{
jsBlock = "<script>EndTrans('資料寫入錯誤。');</script>";
Response.Write(jsBlock);
Response.Flush();
err = true;
break;
}
}
}
///-----------------------------------------------------
System.Threading.Thread.Sleep(20);
float cposf = 0;
cposf = 100 * i / maxrows;
int cpos = (int)cposf;
jsBlock = "<script>SetPorgressBar('" + "第" + i.ToString() + "條','" + cpos.ToString() + "');</script>";
Response.Write(jsBlock);
Response.Flush();
}
if (!err)
{
// 處理完成
jsBlock = "<script>EndTrans('處理完成。');</script>";
Response.Write(jsBlock);
Response.Flush();
}
// 用時
endTime = DateTime.Now;
jsBlock = "<script>SetTimeInfo('用時" + GetTimeSpan(startTime, endTime) + "');</script>";
Response.Write(jsBlock);
Response.Flush();
//////////////////顯示進度/////////////////////////////////////////////////////////////////////////////////////
try
{
workBook.Close(null, null, null);
cexcelapp.Workbooks.Close();
cexcelapp.Application.Quit();
cexcelapp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
System.Runtime.InteropServices.Marshal.ReleaseComObject(workBook);
System.Runtime.InteropServices.Marshal.ReleaseComObject(cexcelapp);
workBook = null;
cexcelapp = null;
GC.Collect();
}
catch (Exception e1)
{
throw e1;
}
finally
{
Process[] myProcesses;
DateTime startTime1;
myProcesses = Process.GetProcessesByName("Excel");
//得不到Excel程序ID，暫時只能判斷程序啟動時間
foreach (Process myProcess in myProcesses)
{
startTime1 = myProcess.StartTime;
if (startTime1 > beforeTime && startTime < afterTime)
{
myProcess.Kill();
}
}
}
System.IO.File.Delete(filepath);
}
ProgressBar.htm 檔案內容如下：
<html>
<head>
<title></title>
<script language="javascript">
//開始處理
function BeginTrans(msg)
{
WriteText("Msg1",msg);
}
//設定進度條進度
function SetPorgressBar(msg, pos)
{
ProgressBar.style.width= pos + "%";
WriteText("Msg1",msg + " 已完成" + pos + "%");
}
//處理結束
function EndTrans(msg)
{
if(msg=="")
WriteText("Msg1","完成。");
else
WriteText("Msg1",msg);
}
//設定時間資訊
function SetTimeInfo(msg)
{
WriteText("Msg2",msg);
}
// 更新文字顯示資訊
function WriteText(id, str)
{
var strTag = '<font face="Verdana, Arial, Helvetica" size="2" color="#ea9b02"><B>' + str + '</B></font>';
if (document.all) document.all[id].innerHTML = strTag;
}
</script>
</head>
<body>
<table align="center" style="height:100%">
<tr style="height:45%"><td></td></tr>
<tr>
<td>
<div id="Msg1" style="height:16px;">
<font face="Verdana, Arial, Helvetica" size="2" color="#ea9b02"><b>正在載入...</b></font></div>
<div id="ProgressBarSide" style="width:300px; color:Silver;border-width:1px; border-style:Solid;">
<div id="ProgressBar" align="center" style="height:20px; width:0%; background-color:#316AC5;"></div>
</div>
<div id="Msg2" style="height:16px;"><font face="Verdana, Arial, Helvetica" size="2" color="#ea9b02"><b></b></font></div>
</td>
</tr>
<tr style="height:50%"><td></td></tr>
</table>
</body>
</html>