在vb.net中将数据导出到excel

Question

我无法将数据导出到 Excel。
我已经尝试过 S/O 上的建议，但没有任何运气。

        Dim sqlString As String = "spExportRateProfile" & Session("OfficeNumber") & "," & Session("SalesRepID")
        Dim conn As SqlConnection = New SqlConnection(Utils.GetConfigKey("ConnectionStringVimas"))
        conn.Open()
        Dim dt As DataTable = New DataTable()
        Dim da As SqlDataAdapter = New SqlDataAdapter(sqlString, conn)
        da.Fill(dt)

        Response.AddHeader("content-disposition", "attachment;filename=ReportExport.xlsx")
        Response.ContentType = "application/vnd.ms-excel"  

此后我需要做什么才能将数据导出到 Excel？

Answer 1

您可以使用我强烈推荐的 ExcelLibrary，例如 EPPlus(GPL)。

然后，从数据表创建 Excel 文件并将其写入响应就如此简单：

Dim pck = New ExcelPackage()
Dim ws = pck.Workbook.Worksheets.Add("Worksheet-Name")
ws.Cells("A1").LoadFromDataTable(dt, True, OfficeOpenXml.Table.TableStyles.Medium1)
Response.Clear()
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
Response.AddHeader("content-disposition", "attachment;  filename=ExcelFileName.xlsx")
Response.BinaryWrite(pck.GetAsByteArray())

这是另一个示例： http://epplus.codeplex.com/wikipage?title=WebapplicationExample

Answer 2

一旦您在此处有了数据表 dt，您就应该执行此操作（C# - 刚刚从 Internet 复制）

...
da.Fill(dt);

Response.ContentType = "Application/x-msexcel";
Response.AddHeader("content-disposition", "attachment; filename=\"test.csv\"");
Response.Write((new ExportXMLCSV()).ToCSV(dt));
Response.End();

，这里是类 ExportXMLCSV 的方法 ToCSV （C# - 刚刚从 Internet 复制）

public string ToCSV(DataTable dataTable)
    {
        //create the stringbuilder that would hold our data
        StringBuilder sb = new StringBuilder();
        //check if there are columns in our datatable
        if (dataTable.Columns.Count != 0)
        {
            //loop thru each of the columns so that we could build the headers
            //for each field in our datatable
            foreach (DataColumn column in dataTable.Columns)
            {
                //append the column name followed by our separator
                sb.Append(column.ColumnName + ',');
            }
            //append a carriage return
            sb.Append("\r\n");
            //loop thru each row of our datatable
            foreach (DataRow row in dataTable.Rows)
            {
                //loop thru each column in our datatable
                foreach (DataColumn column in dataTable.Columns)
                {
                    //get the value for tht row on the specified column
                    // and append our separator
                    sb.Append(row[column].ToString() + ',');
                }
                //append a carriage return
                sb.Append("\r\n");
            }
        }
        //return our values
        return sb.ToString();
    }

所有内容都从这里复制： http://forums.asp.net/t/1115305.aspx 你应该可以进行一些转换 C# 的练习 -> VB.NET;-)