Question

我正在使用c＃处理项目，我在保存面板时遇到问题。我有一个列表框，我选择了要加载到面板中的表单。但是当我想保存我的面板时，它无法读取它的内容。保存我的面板后，我想将其转换为pdf文档，但是当我无法保存它时，这是不可能的。有人可以帮帮我吗？

    protected void btnPDF_Click(object sender, EventArgs e)
    {
        int teller = 0;

        foreach (Control Ctrl in pnlMain.Controls)
        {
            if (Ctrl is Label)
            {
                teller++;
            }

        }

        int teller2 = 0;
        Label[] arr_label = new Label[teller];

        foreach (Control Ctrl in pnlMain.Controls)
        {
            if (Ctrl is Label)
            {
                Label lbl_Ctrl = Ctrl as Label;
                arr_label[teller2] = lbl_Ctrl;
                teller2++;
            }
        }

        int teller3 = 0;
        int lengte = arr_label.Length;
        String hulp1;


        //aanmaken van uw document
        var doc1 = new Document(PageSize.A4, 50, 50, 25, 25);

        //aanmaken van  de outputstream
        var output = new MemoryStream(); //geen extra argumenten nodig

        //aanmaken van een "pdfwriter document"
        var writer = PdfWriter.GetInstance(doc1, output);

        //voor je in je document iets kan "schrijven" moet je het eerst openen:
        doc1.Open();

        while (teller3 < lengte)
        {
            Label hulp;

            hulp = arr_label[teller3];
            hulp1 = hulp.Text;
            teller3++;

            //bepaal de inhoud van je pdf document (locatie)
            string inhoud = File.ReadAllText(Server.MapPath("pdf.aspx"));
            var parsedHtmlElements = HTMLWorker.ParseToList(new StringReader(hulp1), null);

            //alle elementen van uw pagina in de pdf steken (foreach.... zeer handige functie)
            foreach (var htmlElement in parsedHtmlElements)
                doc1.Add(htmlElement as IElement);

        }
        //nu de pdf gemaakt is gaan we de boel afsluiten:
        doc1.Close();

        Response.ContentType = "application/pdf";
        Response.AddHeader("Content-Disposition", string.Format("attachment;filename= Evaluatierapport.pdf"));
        Response.BinaryWrite(output.ToArray());       
    }





      private void btnSave_Click(object sender, EventArgs e) 
      {
          SaveFileDialog saveFileDialog = new SaveFileDialog();

          saveFileDialog.DefaultExt = "bmp";
          saveFileDialog.Filter = "Bitmap files|*.bmp";
          if (saveFileDialog.ShowDialog() == DialogResult.OK)
          {
              int width = pnlMain.Width;
              int height = panel.Height;

              Bitmap bitMap = new Bitmap(width, height);
              System.Drawing.Rectangle rec = new Rectangle(0, 0, width, height);

              panel.DrawToBitmap(bitMap, rec);

              bitMap.Save(saveFileDialog.FileName);
          }
      }
}

Answer 1

通过这个我认为你是动态加载控件：

我有一个列表框，我选择了表格我想加载到我的面板中。

动态添加的控件不会通过回发持续存在。您需要使用相同的ID重新添加它们...或者自己在viewstate中进行筛选。

[编辑]

看看这些：

[/编辑]

如何在c＃中保存面板的内容？

1 个答案: