Question

我在这里遇到了问题，希望有人能帮我解决问题。问题是：即时通讯使用c＃和mvc。我想将db表传递给另一个函数。我不知道如何解决这个问题。希望那里有人可以帮助我

public ActionResult Index()
    {
        var viewModel = db.test.ToList()
        ExportExcel(viewModel); //pass current table to excel to export
        return View(viewModel);
    }

//export to excel
public ActionResult ExportExcel(xxxx viewModel)
    {
        var grid = new GridView();
        grid.DataSource = from p in viewModel
                          select new
                          {
                              Name = p.name,
                              No = p.staffno
                          };
        grid.DataBind();

        Response.ClearContent();
        Response.Buffer = true;
        Response.AddHeader("content-disposition", "attachment; filename=MyExcelFile.xls");
        Response.ContentType = "application/ms-excel";

        Response.Charset = "";
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);

        grid.RenderControl(htw);

        Response.Output.Write(sw.ToString());
        Response.Flush();
        Response.End();

        return View("MyView");
    }

Answer 1

将ExportExcel函数返回类型更改为bool或void，并将参数更改为viewmodel而不是xxxx .. 您可以将该代码移动到某个实用程序类。

Answer 2

由于View("viewName")会返回一个查看结果，您可以直接调用它并从Index方法返回它，前提是您将viewModel传递给ExportExcel方法。

public ActionResult Index()
{
    var viewModel = db.test.ToList()
    var viewResult = ExportExcel(viewModel);
    return viewResult;
}

//export to excel
public ActionResult ExportExcel(List<test> viewModel)
{
    var grid = new GridView();
    grid.DataSource = from p in viewModel
                      select new
                      {
                          Name = p.name,
                          No = p.staffno
                      };
    grid.DataBind();

    Response.ClearContent();
    Response.Buffer = true;
    Response.AddHeader("content-disposition", "attachment; filename=MyExcelFile.xls");
    Response.ContentType = "application/ms-excel";

    Response.Charset = "";
    StringWriter sw = new StringWriter();
    HtmlTextWriter htw = new HtmlTextWriter(sw);

    grid.RenderControl(htw);

    Response.Output.Write(sw.ToString());
    Response.Flush();
    Response.End();

    return View("MyView");
}

Answer 3

假设viewModel是System.Data.DataTable：

    public ActionResult Index()
    {
        // Dummy data
        var dt = new DataTable();
        dt.Columns.Add("id", typeof(int));
        var row = dt.NewRow();
        row[0] = 4;
        dt.Rows.Add(row);

        ExportExcel(dt);
        return View();
    }

在导出方法中，将参数类型更改为DataTable：

    public EmptyResult ExportExcel(DataTable test)
    {
        var grid = new GridView();

        grid.DataSource = test;
        grid.DataBind();
       ... your existing code 
        return new EmptyResult();
    }

将查询表传递给mvc中的另一个函数c＃

3 个答案: