Question

我似乎总是遇到这个问题。我在View外面有一个按钮，它调用一个需要OrderNumber的函数。我一直收到错误，

ArgumentOutOfRangeException was unhandled by user code

在调试模式下，或者在浏览器中，

Specified argument was out of the range of valid values.

这就是我访问它的方式：

string sOrderNumber = (Order_DetailsView.Rows[0].Cells[0].Controls[0] as TextBox).Text;
int orderNumber = Int32.Parse(sOrderNumber);

我也尝试了((TextBox)Order_DetailsView.Rows[0].Cells[0].Controls[0]).Text以及Rows[i].Cells[i].Controls[i]中我可以理解的每个索引组合。

这是DetailsView：

<asp:DetailsView ID="Order_DetailsView" runat="server" AutoGenerateRows="False">
    <Fields>
        <asp:BoundField DataField="OrderNumber" HeaderText="Order #" />
        <asp:BoundField DataField="GST" HeaderText="GST" DataFormatString="{0:c}" />
        <asp:BoundField DataField="Total" HeaderText="Total" DataFormatString="{0:c}" />
    </Fields>
</asp:DetailsView>

我只是这样做错了吗？我查看了我能找到的每个例子，我的代码看起来是合法的。我觉得必须有一些我忽略的简单事物。

Answer 1

应该有一个TemplateField如下：

<asp:DetailsView ID="Order_DetailsView" runat="server" AutoGenerateRows="False">
<Fields>
    <asp:BoundField DataField="OrderNumber" HeaderText="Order #" />
    <asp:BoundField DataField="GST" HeaderText="GST" DataFormatString="{0:c}" />
    <asp:BoundField DataField="Total" HeaderText="Total" DataFormatString="{0:c}" />
    <asp:TemplateField HeaderText="Order Number">                
        <ItemTemplate>
            <asp:TextBox ID="txtOrderNo" runat="server" Text='<%# Bind("OrderNumber") %>'></asp:TextBox>
        </ItemTemplate>                    
    </asp:TemplateField>
</Fields>
</asp:DetailsView>

然后你可以这样访问它：

string sOrderNumber = ((TextBox)Order_DetailsView.Rows[0].Cells[0].FindControl("txtOrderNo")).Text;

对于BoundField值，您可以这样做：

protected void Order_DetailsView_DataBound(object sender, EventArgs e)
{
    string MyOrderNumber = Order_DetailsView.Rows[0].Cells[0].Text;
}

Answer 2

您的详细信息视图中没有TextBox控件，您应该使用TemplateField，如下所示：

<asp:DetailsView ID="Order_DetailsView" runat="server" AutoGenerateRows="False">
    <Fields>
        <asp:BoundField DataField="OrderNumber" HeaderText="Order #" />
        <asp:TemplateField HeaderText="Order #">
            <ItemTemplate>
                <asp:Label ID="LabelOrderNumber" runat="server" 
                           Text='<%# Eval("OrderNumber") %>'>
                </asp:Label>
           </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="GST" HeaderText="GST" DataFormatString="{0:c}" />
        <asp:BoundField DataField="Total" HeaderText="Total" DataFormatString="{0:c}" />
    </Fields>
</asp:DetailsView>

然后您可以使用FindControl()方法按ID值获取Label控件，如下所示：

Label theOrderNumberLabel = Order_DetailsView.FindControl("LabelOrderNumber") as Label;

// Verify that we found the label before we try to use it
if(theOrderNumberLabel != null)
{
    string orderNumberText = theOrderNumberLabel.Text;

    // Do something with order number here

}

Answer 3

您的详细信息中没有文本框是Cell。所以你需要改变你的代码。

string sOrderNumber = Order_DetailsView.Rows[0].Cells[0].Text.ToString();
int orderNumber = Int32.Parse(sOrderNumber);

Answer 4

**//This controller.cs class will make a .pdf file from the query output.  Change //the values at "p" from the attributes of your database table.
//The href tag of calling the controller class Action Export method from the //View class as a MVC design is: 
// <a href="@Url.Action("Export","tblOrder")">Print Orders</a>
//Make sure to make the model class with crystal report design and ADO.NET //dataset.  I have only include the controller class of the MVC model to 
//make it work only.**

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcApplicationCrystalReportRptSTP.Reports;
using MvcApplicationCrystalReportRptSTP.Models;
using CrystalDecisions.CrystalReports.Engine;
using System.IO;

namespace MvcApplicationCrystalReportRptSTP.Controllers
{
    public class tblOrderController : Controller
    {
        private DB_JDBCLOGEntities mde = new DB_JDBCLOGEntities();
        //
        // GET: /tblOrder/

        public ActionResult Index()
        {
            ViewBag.ListProducts = mde.tblOrders.ToList();
            return View();
        }
        public ActionResult Export()
        {
            ReportDocument rd = new ReportDocument();
            rd.Load(Path.Combine(Server.MapPath("~/Reports/CrystalReporttblOrder.rpt")));
            rd.SetDataSource(mde.tblOrders.Select(p=> new
            {
            ID=  p.ID,
            Ordernum=p.Ordernum,
            Username=p.Username,
            Password=p.Password,
            Price=p.Price.Value,
            AddCart=p.AddCart.Value,
            Image=p.Image
            }).ToList());
            Response.Buffer=false;
            Response.ClearContent();
            Response.ClearHeaders();
            Stream stream = rd.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
            stream.Seek(0, SeekOrigin.Begin);
            return File(stream,"application/pdf","tblOrder.pdf");
        }
    }
}

发布者：Aneel Goplani。 CIS。 2002年。美国。明尼苏达州立大学，曼凯托。

从DetailsView获取BoundField的值

4 个答案: