Question

我使用以下代码通过http请求发送csv文件。代码运行正常，但文件未在客户端计算机上下载，不保存为菜单，不显示任何内容。我用于另一个报告的相同代码，它工作正常，文件也下载。我在本地主机上运行该项目。但不适用于按钮btnGenerateReport。

protected void btnGenerateReport_Click(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
        MHSProgressNotesBL oMHSProgressNote = new MHSProgressNotesBL();
        int ClientId = Convert.ToInt32(ddlClients.SelectedValue);
        int LocationId = Convert.ToInt32(ddlLocations.SelectedValue);
        int PractitionerId = Convert.ToInt32(ddlPractitioner.SelectedValue);

        dt = oMHSProgressNote.FetchBillingReport(LocationId, ClientId, PractitionerId, Convert.ToDateTime(txtNoteStartDate.Text), Convert.ToDateTime(txtNoteEndDate.Text));
        WriteToCSV(dt);

    }

    private void WriteToCSV(DataTable dt)
    {
        try
        {
            string attachment = "attachment; filename=ClientRoster.csv";
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.ClearHeaders();
            HttpContext.Current.Response.ClearContent();
            HttpContext.Current.Response.AddHeader("content-disposition", attachment);
            HttpContext.Current.Response.ContentType = "text/csv";
            //HttpContext.Current.Response.AddHeader("Pragma", "public");
            WriteColumnName(dt);
            foreach (DataRow clientdata in dt.Rows)
            {
                WriteUserInfo(clientdata);
            }
            HttpContext.Current.Response.End();
            //HttpContext.Current.ApplicationInstance.CompleteRequest();
        }
        catch (Exception e)
        { }

    }

    private void WriteColumnName(DataTable dt)
    {
        string columnNames = "";
        // Write Header row
        foreach (DataColumn item in dt.Columns)
        {
            if (item.ColumnName.Contains(','))
            {
                columnNames += "\"" + item.ColumnName + "\"";
            }
            else
            {
                columnNames += item.ColumnName + ",";
            }
        }
        columnNames = columnNames.TrimEnd(',');

        HttpContext.Current.Response.Write(columnNames);
        HttpContext.Current.Response.Write(Environment.NewLine);
    }

    private void WriteUserInfo(DataRow clientDataRow)
    {
        StringBuilder stringBuilder = new StringBuilder();

        foreach (var item in clientDataRow.ItemArray)
        {
            AddComma((string)(item == System.DBNull.Value ? "" : item.ToString()), stringBuilder);
        }
        HttpContext.Current.Response.Write(stringBuilder.ToString().TrimEnd(','));
        HttpContext.Current.Response.Write(Environment.NewLine);

    }

    private void AddComma(string value, StringBuilder stringBuilder)
    {
        if (value.Contains('"'))
        {
            value = value.Replace(@"""", @"""""");
            value = "\"" + value + "\"";
        }
        else if (value.Contains(','))
        {
            value = "\"" + value + "\"";
        }
        stringBuilder.Append(value);
        stringBuilder.Append(",");
    }

Answer 1

代码没问题.........主要问题是按钮btnGenerateReport位于更新面板内。错误正在上升：无法解析从服务器收到的消息。此错误的常见原因是通过调用Response.Write（），响应过滤器，HttpModules或服务器跟踪来修改响应。详细信息：在“客户端，从业者”附近解析时出错。将按钮放在更新面板之外后，代码工作正常。

csv文件无法从asp.net c＃app在chrome浏览器中下载

1 个答案: