Question

您好我正在使用ASP.NET应用程序并在扩展名为.csv的excel页面中生成报告。但是我想用.xlsx etension来制作它。我目前使用的代码如下：受保护的子btnSubmit_Click（ByVal sender As Object，ByVal e As EventArgs）处理btnSubmit.Click

    Dim sql As String
    Dim strLine As String = ""
    Dim attachment As String = "attachment; filename=PTW.csv"

    m_sBranch = ddlBranches.SelectedValue
    m_sRegion = ddlAreas.SelectedValue

    Dim cnn As SqlConnection = New SqlConnection("Server=XYZ;Database=abc;Trusted_Connection=yes;") 

    HttpContext.Current.Response.AddHeader("content-disposition", attachment)
    HttpContext.Current.Response.ContentType = "text/csv"

    cnn.Open()

    sql = GetReportSql(m_sBranch, m_sRegion)

    Dim cmd As SqlCommand = New SqlCommand(sql, cnn)
    Dim dr As SqlDataReader
    dr = cmd.ExecuteReader()

    HttpContext.Current.Response.Write("PTW JOBS - EXPORTED ON " + DateTime.Now)

    For i = 0 To dr.FieldCount - 1
        strLine = strLine & dr.GetName(i).ToString & ","
    Next
    HttpContext.Current.Response.Write(strLine)

    Dim sb As StringBuilder = New StringBuilder()
    Dim temp As String = ""
    While dr.Read()
        For i = 0 To dr.FieldCount - 1
            temp = temp & dr.GetValue(i)
            temp = temp.Replace(",", " ")
            sb.Append(temp & ",")
            temp = ""
        Next
        sb.AppendLine()
        strLine = ""                            
    End While

    HttpContext.Current.Response.Write(sb.ToString())

End Sub

任何帮助都将受到高度赞赏。感谢。

Answer 1

了解OpenXML SDK：我知道我的示例不会转换.csv文件，但它会引导您朝着正确的方向前进。 http://msdn.microsoft.com/en-us/library/bb448854(office.14).aspx

我已经在asp.net中使用它来动态创建xlsx文档，直接流式传输到Web客户端：

public static System.IO.MemoryStream ConvertToExcel(DataSet ds)
        {
            System.IO.MemoryStream stream = new System.IO.MemoryStream();
            using (SpreadsheetDocument package = SpreadsheetDocument.Create(stream, SpreadsheetDocumentType.Workbook, true))
            {
                package.AddWorkbookPart();
                package.WorkbookPart.Workbook = new Workbook();
                package.WorkbookPart.AddNewPart<WorksheetPart>();

                if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
                {
                    DataTable tbl = ds.Tables[0];
                    SheetData xlSheetData = new SheetData();
                    foreach (DataRow row in tbl.Rows)
                    {
                        Row xlRow = new Row();
                        foreach (DataColumn col in tbl.Columns)
                        {
                            object cellData = row[col];
                            Cell xlCell = null;
                            if (cellData != null)
                            {
                                xlCell = new Cell(new InlineString(new DocumentFormat.OpenXml.Spreadsheet.Text(cellData.ToString()))) { DataType = CellValues.InlineString };
                            }
                            else
                            {
                                xlCell = new Cell(new InlineString(new DocumentFormat.OpenXml.Spreadsheet.Text(String.Empty))) { DataType = CellValues.InlineString };
                            }
                            xlRow.Append(xlCell);
                        }
                        xlSheetData.Append(xlRow);
                    }

                    package.WorkbookPart.WorksheetParts.First().Worksheet = new Worksheet(xlSheetData);
                    package.WorkbookPart.WorksheetParts.First().Worksheet.Save();

                    // create the worksheet to workbook relation
                    package.WorkbookPart.Workbook.AppendChild(new Sheets());
                    package.WorkbookPart.Workbook.GetFirstChild<Sheets>().AppendChild(new Sheet()
                    {
                        Id = package.WorkbookPart.GetIdOfPart(package.WorkbookPart.WorksheetParts.First()),

                        SheetId = 1,

                        Name = "Sheet1"

                    });

                    package.WorkbookPart.Workbook.Save();

                }
            }
            return stream;
        }

Answer 2

Shariful，根据我所读过的内容（尚未尝试过），我认为最好的方法是按照概述here.设置您的HTTP响应标头

简而言之，关键似乎是将内容处置标题设置为＆＃34; attachment＆＃34;。

e.g：

Content-Disposition: attachment; filename=<file name.ext>

很抱歉，我还没有对此进行过测试，但在我搜索与之密切相关的内容时，几乎我去过的每个地方都建议使用此方法来强制下载对话框。

从.csv文件转换为.xlsx excel文件

2 个答案: