PDFをクリックすると、外出先でプリンターの値を取得する機能を備えたWebページがあります。時間がかかるため、クリックを繰り返すと Web ページがクラッシュします。
関数の現在の実行を中止したり、一度クリックした後にボタンのクリックを無効にしたりする方法はありますか?
UI コード:
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<Triggers>
<asp:PostBackTrigger ControlID="imgExportPDF" />
</Triggers>
<ContentTemplate>
<table id="topHeading" width="100%" cellspacing="0" cellpadding="0" border="0" class="PageHeader">
<tr align="center" style="height: 25px" class="PageHeader2">
<td>
</td>
<td align="right" valign="bottom" style="width: 30%" visible="false">
<asp:ImageButton ID="imgExportPDF" runat="server" ImageUrl="~/Images/pdf-Export.jpg"
</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
そして私のバックエンドコード:
protected void imgExportPDF_Click(object sender, ImageClickEventArgs e)
{
saveDetails();
int counterAdd = 0;
DataSet dsDevNotReady = CDBIntract.GetDevNotReady(EnterpriseV, CDInfonew.Count);
if (dsDevNotReady != null)
{
if (dsDevNotReady.Tables[0].Rows.Count > 0)
{
for (int i = 0; i < dsDevNotReady.Tables[0].Rows.Count; i++)
{
sb.Append((deviceCounter + 1) + ". IP Address : " + dsDevNotReady.Tables[0].Rows[i]["IPAddress"].ToString() + " And Model Name : " + dsDevNotReady.Tables[0].Rows[i]["Model"].ToString() + " On Date : " + DateTime.Now.ToString() + " " + dsDevNotReady.Tables[0].Rows[i]["Info"].ToString());
sb.Append("\r\n");
deviceCounter++;
}
counterAdd++;
}
}
int countData = 0;
DataSet dsdev= CDBIntract.Blah(EnterpriseV, CDInfonew.Count);
if (dsDev != null)
{
if (dsDev.Tables[0].Rows.Count > 0)
{
countData = dsDev.Tables[0].Rows.Count + Convert.ToInt32(dsDev.Tables[1].Rows[0]["AditionalRows1"].ToString()) + Convert.ToInt32(dsDev.Tables[2].Rows[0]["AditionalRows2"].ToString());
PdfDocument myPdfDocument = new PdfDocument(PdfDocumentFormat.A4);
PdfTable myPdfTable = myPdfDocument.NewTable(new Font("Verdana", 8), countData + counterAdd, 2, 4);
myPdfTable.ImportDataTable(returnTable(dsDev, deviceCounter, sb.ToString()));
//Set PDF Table Style
myPdfTable.HeadersRow.SetFont(new Font("Arial", 8, FontStyle.Bold));
myPdfTable.HeadersRow.SetColors(System.Drawing.Color.Gray, System.Drawing.Color.Gray);
myPdfTable.SetColors(Color.Black, Color.White, Color.White);
myPdfTable.SetBorders(Color.Gray, 1, BorderType.CompleteGrid);
myPdfTable.SetColumnsWidth(new int[] { 30, 30 });
int[] arrayDevice = listDevice.ToArray();
for (int m = 0; m < arrayDevice.Length; m++)
{
try
{
foreach (PdfCell pc in myPdfTable.CellRange(arrayDevice[m], 0, arrayDevice[m], 0).Cells)
{
pc.ColSpan = 2;
pc.SetCellPadding(4);
pc.SetColors(Color.Red, Color.LightGray);
pc.SetFont(new Font("Arial", 10, FontStyle.Bold));
}
}
catch (Exception ex)
{ }
}
int[] array = list.ToArray();
for (int m = 0; m < array.Length; m++)
{
try
{
foreach (PdfCell pc in myPdfTable.CellRange(array[m], 0, array[m], 0).Cells)//(0//,0//,0//Number of rows,0//column)
{
pc.ColSpan = 2;
pc.SetCellPadding(4);
pc.SetColors(Color.Blue, Color.LightGray);
pc.SetFont(new Font("Arial", 10, FontStyle.Bold));
}
}
catch (Exception ex)
{ }
}
int[] array1 = list2.ToArray();
for (int n = 0; n < array1.Length; n++)
{
try
{
foreach (PdfCell pc in myPdfTable.CellRange(array1[n], 0, array1[n], 0).Cells)//(0//,0//,0//Number of rows,0//column)
{
pc.ColSpan = 2;
pc.SetCellPadding(4);
pc.SetColors(Color.Blue, Color.LightGray);
pc.SetFont(new Font("Arial", 8, FontStyle.Bold));
}
}
catch (Exception ex)
{ }
}
int[] array2 = list3.ToArray();
for (int k = 0; k < array2.Length; k++)
{
try
{
foreach (PdfCell pc in myPdfTable.CellRange(array2[k], 0, array2[k], 0).Cells)//(0//,0//,0//Number of rows,0//column)
{
pc.ColSpan = 2;
pc.SetCellPadding(4);
//pc.SetColors(Color.Blue, Color.LightGray);
if (k == 0)
pc.SetFont(new Font("Arial", 8, FontStyle.Bold));
}
}
catch (Exception ex)
{
}
}
myPdfTable.SetRowHeight(100);
// Now we set some alignment... for the whole table and then, for a column.
myPdfTable.SetContentAlignment(ContentAlignment.MiddleLeft);
string logo = HttpContext.Current.Server.MapPath(".") + "/images/Printeaze_Logo02.jpg";
PdfImage LogoImage = myPdfDocument.NewImage(logo);
string companylogo = HttpContext.Current.Server.MapPath(".") + "/images/CompanyLogo.jpg";
PdfImage CompanyLogo = myPdfDocument.NewImage(companylogo);
int i = 0;
PdfTablePage newPdfTablePage;
// Here we start the loop to generate the table...
while (!myPdfTable.AllTablePagesCreated)
{
// we create a new page to put the generation of the new TablePage:
i++;
PdfPage newPdfPage = myPdfDocument.NewPage();
if (i == 1)
{
newPdfTablePage =
myPdfTable.CreateTablePage(new PdfArea(myPdfDocument, 18, 120, 560, 680));
// newPdfTablePage =
// myPdfTable.CreateTablePage(new PdfArea(myPdfDocument, 18, 120, 560, 450));
newPdfPage.Add(LogoImage, 460, 30, 120);
newPdfPage.Add(CompanyLogo, 20, 20, 120);
// we also put a Label
PdfTextArea pta = new PdfTextArea(new Font("Verdana", 16, FontStyle.Bold), Color.Black
, new PdfArea(myPdfDocument, 20, 70, 350, 20), ContentAlignment.MiddleLeft, "Blah");
newPdfPage.Add(newPdfTablePage);
newPdfPage.Add(pta);
//PointF pointstart = new PointF(20, 140);
//PointF pointend = new PointF(578, 140);
}
else
{
newPdfTablePage = myPdfTable.CreateTablePage(new PdfArea(myPdfDocument, 18, 15, 560, 800));
// newPdfTablePage = myPdfTable.CreateTablePage(new PdfArea(myPdfDocument, 18, 15, 600, 650));
newPdfPage.Add(newPdfTablePage);
}
newPdfPage.SaveToDocument();
}
// Finally we save the docuement...
//myPdfDocument.SaveToFile("PDF.pdf");
MemoryStream stream = new MemoryStream();
myPdfDocument.SaveToStream(stream);
Response.ClearHeaders();
Response.ClearContent();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename= Blah.pdf");
Response.BinaryWrite(stream.ToArray());
HttpContext.Current.ApplicationInstance.CompleteRequest();
}
}
}