asp.net linq用于显示信息 [英] asp.net linq for displayin information

问题描述

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class crudoperations : System.Web.UI.Page
{

        inventoryDataContext obj = new inventoryDataContext();


    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnDisplay_Click(object sender, EventArgs e)
    {
        //displaying the product information based onn the entered by user with in textbox1
        var result = from p in obj.products
                     where p.prodid=txtprodid.Text*************here iam getting the error******
                     select p;
        if (result.Count() == 0)
            Response.Write("<h1>no products</h1>");
        else
        {
            foreach (var pp in result)
            {
                txtProddesc.Text = pp.proddesc;
                txtPrice.Text = pp.price.ToString() ;
            }
        }
    }
}

...







这里我得到一个错误不能隐式转换类型bool到字符串可以任何人帮助我，...如何纠正它

...



here iam getting an error cannot implicitly convert type bool to string can any one help me ,... how to rectify it

推荐答案

更正的代码

Corrected code

var result = from p in obj.products
                    where p.prodid==Convert.ToBoolean(txtprodid.Text.Trim())//Corrected here
                    select p;

在这里使用复选框而不是文本框

Use a checkbox instead of a textbox here

引用：

txtprodid.Text.Trim（）

txtprodid.Text.Trim()

var result = from p in obj.products
                     where p.prodid=txtprodid.Text*************here iam getting the error******
                     select p;

需要：

Needs to be:

var result = from p in obj.products
                     where p.prodid==txtprodid.Text
                     select p;

注意==是平等...

Notice the == is equality...

这篇关于asp.net linq用于显示信息的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！