列'productid'不属于表格表。 [英] Column 'productid' does not belong to table table.
本文介绍了列'productid'不属于表格表。的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class cart : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add("sno");
dt.Columns.Add("productid");
dt.Columns.Add("productname");
dt.Columns.Add("quantity");
dt.Columns.Add("price");
dt.Columns.Add("totalprice");
dt.Columns.Add("productimage");
/*dt.Columns.Add(new DataColumn("sr"));
dt.Columns.Add(new DataColumn("totalprice"));
dt.Columns.Add(new DataColumn("productid"));
dt.Columns.Add(new DataColumn("productname"));
dt.Columns.Add(new DataColumn("quantity"));
dt.Columns.Add(new DataColumn("price"));
dt.Columns.Add(new DataColumn("productimage"));*/
if (Request.QueryString["prodid"] != null)
{
if (Session["Buyitems"] == null)
{
dr = dt.NewRow();
SqlConnection scon = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
String myquery = "select * from comprod where prodid=" + Request.QueryString["prodid"];
SqlCommand cmd = new SqlCommand();
cmd.CommandText = myquery;
cmd.Connection = scon;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;
DataSet ds = new DataSet();
da.Fill(ds);
/*for (int i = 1; i < 10; i++)
{
//DataRow dr = dt.NewRow();
dr["productid"] = i.ToString();
dr["productname"] = "productname " + i.ToString();
dr["price"] = i.ToString();
dr["quantity"] = i.ToString();
dr["totalprice"] = i.ToString();
dr["productimage"] = i.ToString();
dt.Rows.Add(dr);
}*/
dr["sno"] = 1;
dr["productid"] = ds.Tables[0].Rows[0]["productid"].ToString();
dr["productname"] = ds.Tables[0].Rows[0]["productname"].ToString();
dr["productimage"] = ds.Tables[0].Rows[0]["productimage"].ToString();
dr["quantity"] = Request.QueryString["quantity"];
dr["price"] = ds.Tables[0].Rows[0]["price"].ToString();
int price = Convert.ToInt16(ds.Tables[0].Rows[0]["price"].ToString());
int quantity = Convert.ToInt16(Request.QueryString["quantity"].ToString());
int totalprice = price * quantity;
dr["totalprice"] = totalprice;
dt.Rows.Add(dr);
GridView1.DataSource = dt;
GridView1.DataBind();
Session["buyitems"] = dt;
GridView1.FooterRow.Cells[5].Text = "Total Amount";
GridView1.FooterRow.Cells[6].Text = grandtotal().ToString();
Response.Redirect("cart.aspx");
}
else
{
dt = (DataTable)Session["buyitems"];
int sr;
sr = dt.Rows.Count;
dr = dt.NewRow();
SqlConnection scon = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
String myquery = "select * from comprod where prodid=" + Request.QueryString["id"];
SqlCommand cmd = new SqlCommand();
cmd.CommandText = myquery;
cmd.Connection = scon;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;
DataSet ds = new DataSet();
da.Fill(ds);
dr["sno"] = sr + 1;
dr["productid"] = ds.Tables[0].Rows[0]["productid"].ToString();
dr["productname"] = ds.Tables[0].Rows[0]["productname"].ToString();
dr["productimage"] = ds.Tables[0].Rows[0]["productimage"].ToString();
dr["quantity"] = Request.QueryString["quantity"];
dr["price"] = ds.Tables[0].Rows[0]["price"].ToString();
int price = Convert.ToInt16(ds.Tables[0].Rows[0]["price"].ToString());
int quantity = Convert.ToInt16(Request.QueryString["quantity"].ToString());
int totalprice = price * quantity;
dr["totalprice"] = totalprice;
dt.Rows.Add(dr);
GridView1.DataSource = dt;
GridView1.DataBind();
Session["buyitems"] = dt;
GridView1.FooterRow.Cells[5].Text = "Total Amount";
GridView1.FooterRow.Cells[6].Text = grandtotal().ToString();
Response.Redirect("cart.aspx");
}
}
else
{
dt = (DataTable)Session["buyitems"];
GridView1.DataSource = dt;
GridView1.DataBind();
if (GridView1.Rows.Count > 0)
{
GridView1.FooterRow.Cells[5].Text = "Total Amount";
GridView1.FooterRow.Cells[6].Text = grandtotal().ToString();
}
}
Label2.Text = GridView1.Rows.Count.ToString();
}
}
public int grandtotal()
{
DataTable dt = new DataTable();
dt = (DataTable)Session["buyitems"];
int nrow = dt.Rows.Count;
int i = 0;
int gtotal = 0;
while(i<nrow)
{
gtotal =gtotal+ Convert.ToInt32(dt.Rows[i]["totalprice"].ToString());
i = i + 1;
}
return gtotal;
}
}
/*protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
DataTable dt = new DataTable();
dt = (DataTable)Session["buyitems"];
for (int i = 0; i <= dt.Rows.Count - 1; i++)
{
int sr;
int sr1;
string qdata;
string dtdata;
sr = Convert.ToInt32(dt.Rows[i]["sno"].ToString());
TableCell cell = GridView1.Rows[e.RowIndex].Cells[0];
qdata = cell.Text;
dtdata = sr.ToString();
sr1 = Convert.ToInt32(qdata);
if (sr == sr1)
{
dt.Rows[i].Delete();
dt.AcceptChanges();
//Label1.Text = "Item Has Been Deleted From Shopping Cart";
break;
}
}
for (int i = 1; i <= dt.Rows.Count; i++)
{
dt.Rows[i - 1]["sno"] = i;
dt.AcceptChanges();
}
Session["buyitems"] = dt;
Response.Redirect("cart.aspx");
}
}
*/
和购物车。 aspx文件
And cart.aspx file
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" ShowFooter="True" >
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:BoundField DataField="sno" HeaderText="Sr No." />
<asp:BoundField DataField="productid" HeaderText="Product Id" />
<asp:ImageField DataImageUrlField="productimage" HeaderText="Image">
</asp:ImageField>
<asp:BoundField DataField="productname" HeaderText="Product Name" />
<asp:BoundField DataField="price" HeaderText="Price" />
<asp:BoundField DataField="quantity" HeaderText="Quantity" />
<asp:BoundField DataField="totalprice" HeaderText="Total Price" />
<asp:CommandField DeleteText="Remove" ShowDeleteButton="True" />
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<SortedAscendingCellStyle BackColor="#FDF5AC" />
<SortedAscendingHeaderStyle BackColor="#4D0000" />
<SortedDescendingCellStyle BackColor="#FCF6C0" />
<SortedDescendingHeaderStyle BackColor="#820000" />
</asp:GridView>
我尝试过：
gridview列值未标识
prodid是我的sqltable和productid是我的gridview列名。
这是我的表：
What I have tried:
gridview column values is not identifing
prodid is my sqltable and productid is my gridview column name.
this is my table:
CREATE TABLE [dbo].[comprod] (
[prodid] INT IDENTITY (1, 1) NOT NULL,
[prodname] NCHAR (200) NULL,
[prodprice] NCHAR (100) NULL,
[proddesc] NCHAR (1000) NULL,
[prodimg] NCHAR (1000) NULL,
[companyname] NCHAR (100) NULL,
[prodtype] NCHAR (50) NULL,
CONSTRAINT [PK_comprod] PRIMARY KEY CLUSTERED ([prodid] ASC)
);
i引用此视频：
#2使用数据库在Asp.Net中实施完整的购物车印地语|电子商务网站|免费 - YouTube [ ^ ]
推荐答案
错误信息非常合理。
看看你的代码：
A error message is quite reasonable.
Take a look at your code:
dt.Columns.Add("productid");
和你的sql命令：
and your sql command:
String myquery = "select * from comprod where prodid=" + Request.QueryString["prodid"];
然后：
then:
dr["productid"] = ds.Tables[0].Rows[0]["productid"].ToString(); //!!!
您是否看到了列名称的不同？
注意，还有一些其他错误，例如：
1）您的代码是 Sql Injection [ ^ ]易受攻击，
2）从不使用连接文本作为查询，
3）使用参数化查询。
如需了解更多详情，请阅读我的过去答案：列'PDTID'不属于表 [ ^ ]
和
发出参数化查询| Microsoft Docs [ ^ ]
如何：执行参数化查询| Microsoft Docs [ ^ ]
Do you see the difference in names of column?
Note, that there's a few other mistakes, like:
1) your code is Sql Injection[^] vulnerable,
2) never use concatenated text as a query,
3) use parameterized queries.
For further details, please, read my past answer: Column 'PDTID' does not belong to table[^]
and
Issuing a Parameterized Query | Microsoft Docs[^]
How to: Execute a Parameterized Query | Microsoft Docs[^]
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