Firmenlogo oben auf der Excel-Datei hinzufügen

Question

Sie müssen beim Herunterladen oben auf der Excel-Datei ein Logo hinzufügen.

Response.Clear(); 
Response.Buffer = true; 
Response.Charset = ""; 
Response.ClearContent(); 
Response.ClearHeaders(); 
string FileName = "MachinePlanning" + DateTime.Now + ".xls"; 
StringWriter strwritter = new StringWriter(); 
HtmlTextWriter htmltextwrtter = new HtmlTextWriter(strwritter); 
Response.Cache.SetCacheability(HttpCacheability.NoCache); 
Response.ContentType = "application/vnd.ms-excel"; 
Response.AddHeader("Content-Disposition", "attachment;filename=" + FileName); 
GridView1.GridLines = GridLines.Both; 
GridView1.HeaderStyle.Font.Bold = true; 
GridView1.RenderControl(htmltextwrtter); 
Response.Write(strwritter.ToString()); 
Response.End(); 

Answer 1

Sie müssen es von Open XML oder NPOI.Dll tun.

Unten Code exportiert Excel mit dem Firmenlogo. aber Sie müssen NPOI.DLL hinzufügen.

public static MemoryStream ExportToExcelWithCompanyLogo(DataTable dt, string sheetName, string CompanyLogo,Dictionary<string, string> filters) 
    { 

    //Create new Excel Workbook 
    var workbook = new HSSFWorkbook(); 
    //Create new Excel Sheet 
    var sheet = workbook.CreateSheet(sheetName); 

    // Add Image Section 
    var patriarch = sheet.CreateDrawingPatriarch(); 
    HSSFClientAnchor anchor; 
    anchor = new HSSFClientAnchor(0, 0, 0, 0, (short)1, 1, (short)5, 6); 
    anchor.AnchorType = 2; 

    string imagesPath = CompanyLogo; 
    //grab the image file 
    //imagesPath = System.IO.Path.Combine(imageLocation, "image.jpg"); 
    //create an image from the path 
    System.Drawing.Image image = System.Drawing.Image.FromFile(imagesPath); 

    MemoryStream ims = new MemoryStream(); 
    //pull the memory stream from the image (I need this for the byte array later) 
    image.Save(ims, System.Drawing.Imaging.ImageFormat.Jpeg); 


    int index = workbook.AddPicture(ims.ToArray(), PictureType.JPEG); 

    var picture = patriarch.CreatePicture(anchor, index); 
    picture.Resize(0.8); 
    //picture.LineStyle = HSSFPicture.LINESTYLE_DASHDOTGEL; 
    sheet.ForceFormulaRecalculation = true; 

    // End of Add image 

    // font Style for Excel title 
    HSSFFont hFont = (HSSFFont)workbook.CreateFont(); 
    hFont.FontHeightInPoints = 16; 
    hFont.FontName = "Calibri"; 
    hFont.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold; 

    HSSFCellStyle hStyle = (HSSFCellStyle)workbook.CreateCellStyle(); 
    hStyle.Alignment = HorizontalAlignment.Center; 
    hStyle.VerticalAlignment = VerticalAlignment.Top; 
    hStyle.SetFont(hFont); 
    // end of excel title style 

    // font for Table header Stylr 
    HSSFFont thhFont = (HSSFFont)workbook.CreateFont(); 
    thhFont.FontHeightInPoints = 12; 
    thhFont.FontName = "Calibri"; 
    thhFont.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold; 

    HSSFCellStyle thhStyle = (HSSFCellStyle)workbook.CreateCellStyle(); 
    thhStyle.Alignment = HorizontalAlignment.Left; 
    thhStyle.VerticalAlignment = VerticalAlignment.Top; 
    thhStyle.SetFont(thhFont); 
    // end of table header font 



    var cra = new NPOI.SS.Util.CellRangeAddress(6, 7, 4, 9); 
    sheet.AddMergedRegion(cra); 

    // Add filters to sheet 
    int filterRows = 9; 
    foreach (var key in filters) 
    { 
    var FilterRow = sheet.CreateRow(filterRows); 
    FilterRow.CreateCell(4).SetCellValue(key.Key + " : "); 
    FilterRow.CreateCell(5).SetCellValue(key.Value); 
    filterRows++; 
    } 


    var HeaderRowNumber = 9 + filters.Keys.Count + 1; 
    //Add rows 
    var headerRow = sheet.CreateRow(HeaderRowNumber); 
    //int totalcolumns = dt.Columns.Count; 
    int columncounter = 0; 

    if (dt.Rows.Count > 0) 
    { 
    foreach (DataColumn c in dt.Columns) 
    { 
    var cell = headerRow.CreateCell(columncounter + 1); 
    cell.SetCellValue(c.ColumnName); 
    cell.CellStyle = thhStyle; 
    columncounter++; 
    } 
    //(Optional) freeze the header row so it is not scrolled 
    //sheet.CreateFreezePane(0, 1, 0, 1); 
    int rowNumber = HeaderRowNumber + 1; 
    int dtrowNumber = 1; 
    //Populate the sheet with values from the grid data 
    foreach (var rows in dt.Rows) 
    { 
    //Create a new Row 
    var row = sheet.CreateRow(rowNumber); 
    //Set cell Value 
    for (int cellnumber = 0; cellnumber < columncounter; cellnumber++) 
    row.CreateCell(cellnumber + 1).SetCellValue(dt.Rows[dtrowNumber - 1][cellnumber].ToString()); 
    rowNumber++; 
    dtrowNumber++; 
    } 
    // create 2 blank rows 
    for (int i = 0; i < 2; i++) 
    { 
    //Create a new Row 
    var row = sheet.CreateRow(rowNumber); 
    //Set cell Value 
    for (int cellnumber = 0; cellnumber < columncounter; cellnumber++) 
    row.CreateCell(cellnumber + 1).SetCellValue(""); 
    rowNumber++; 
    } 

    // Add Date of extraction and source 
    var extractedDate = sheet.CreateRow(rowNumber); 
    var ecel = extractedDate.CreateCell(4); 
    ecel.SetCellValue("Extracted Date : "); 
    // ecel.CellStyle = hStyle; 
    extractedDate.CreateCell(5).SetCellValue(DateTime.Now.ToString("dd - MMM - yyyy")); 
    rowNumber++; 



    var Disclaimer = sheet.CreateRow(rowNumber); 
    var dcel = Disclaimer.CreateCell(4); 
    dcel.SetCellValue("Disclaimer : "); 
    // dcel.CellStyle = hStyle; 
    Disclaimer.CreateCell(5).SetCellValue("All Rights Reserved."); 
    rowNumber++; 

    var Disclaimer1 = sheet.CreateRow(rowNumber); 
    Disclaimer1.CreateCell(5).SetCellValue("Give some information at footer"); 
    rowNumber++; 

    } 
    else 
    { 
    for (int i = 0; i <= 10; i++) 
    headerRow.CreateCell(i).SetCellValue(""); 
    } 
    // End of add rows 
    //Write the Workbook to a memory stream 
    MemoryStream output = new MemoryStream(); 
    workbook.Write(output); 
    return output; 

    } 

Sie können NPOI.Dll herunterladen von diesem Link Download NPOI.dll

Hoffnung dies Ihr Problem lösen wird.