导出带图像的数据到Excel

Question

我正在使用以下代码将带有图像的数据导出到Excel。

密码

protected void ExportToExcel(object sender, EventArgs e)
{
    //Get the data from database into datatable
    string strQuery = "select CustomerID, ContactName, City, PostalCode, display_picture" +
        " from customers";
    SqlCommand cmd = new SqlCommand(strQuery);
    DataTable dt = GetData(cmd);

    //Create a dummy GridView
    GridView GridView1 = new GridView();
    GridView1.AllowPaging = false;
    GridView1.DataSource = dt;
    GridView1.DataBind();

    Response.Clear();
    Response.Buffer = true;
    Response.AddHeader("content-disposition",
     "attachment;filename=DataTable.xls");
    Response.Charset = "";
    Response.ContentType = "application/vnd.ms-excel";
    StringWriter sw = new StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(sw);

    for (int i = 0; i  .textmode { mso-number-format:\@; } ";
    Response.Write(style);
    Response.Output.Write(sw.ToString());
    Response.Flush();
    Response.End();
}

Excel正在正常下载。但问题是当我过滤Excel中的数据时。Excel中的图像位于Mobile中，但不使用单元格属性调整大小。如何使图像与属性，移动和大小与单元格？

Answer 1

EasyXLS是一个库，它还导出带有图像的xlsx和xls文件。

//Create a workbook
ExcelDocument workbook = new ExcelDocument();

//Add a worksheet
ExcelWorksheet worksheet = new ExcelWorksheet("Gridview");
workbook.easy_addWorksheet(worksheet);

//Add the gridview to the worksheet
DataSet dataSet = new DataSet();
dataSet.Tables.Add((DataTable)GridView1.DataSource);
worksheet.easy_insertDataSet(dataSet);

//Add an image
worksheet.easy_addImage("image.jpg", "A10");

//Exporting gridview with image
workbook.easy_WriteXLSXFile("DataTable.xlsx"); 

有关插入图像的更多信息，请访问：

http://www.easyxls.com/manual/basics/excel-image-import-export.html

如果映像字节是从数据库加载的，则需要将映像临时保存在计算机本地。

您还可以检查如何将gridview导出到excel，以了解有关格式化数据的更多信息。

Answer 2

您的代码根本不创建Excel文件，而是创建HTML

使用像EPPlus这样的库创建一个真正的Excel文件要简单得多，也便宜得多。对于初学者，您可以直接从数据表填充工作表

protected void ExportToExcel(object sender, EventArgs e)
{
    ///...
    DataTable dt = GetData(cmd);

    using (ExcelPackage pck = new ExcelPackage())
    {
        //Create the worksheet
        var ws = pck.Workbook.Worksheets.Add("Demo");
        //Load the datatable into the sheet, starting from cell A1. 
        //Print the column names on row 1
        ws.Cells["A1"].LoadFromDataTable(dt, true);
        //That's it!

        //Write it back to the client
        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        Response.AddHeader("content-disposition", "attachment;  filename=ExcelDemo.xlsx");
        Response.BinaryWrite(pck.GetAsByteArray());
    }
}

您可以使用图形添加图片。添加图片方法：

ExcelPicture pic = ws.Drawings.AddPicture("pic1", new FileInfo("PathToMyImage.png"));

结果是一个xlsx文件，它是一个压缩XML文件包。这意味着它实际上比