大家好 我怎么老是出错,希望大家给我指导一下 谢谢啦
第一个页面:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string str = "server =M ;uid=cxy; pwd=123;";
SqlConnection con = new SqlConnection(str);
string sql = "select * from cxy1";
SqlCommand cmd = new SqlCommand(sql, con);
cmd.CommandType = CommandType.Text;
cmd.Connection.Open();
SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read())
{
Response.Write("<a href=shownews.aspx? id="+dr["id"]+">"+dr["title"]+"</a>"+"<br/>");
}
}
}
第二个页面:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;public partial class shownews : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string idx = Request["id"];
string str = "server =M ;uid=cxy; pwd=123;";
SqlConnection con = new SqlConnection(str); string sql = "select * from cxy1 where id="idx"";
SqlCommand cmd = new SqlCommand(sql, con);
cmd.CommandType = CommandType.Text;
cmd.Connection.Open();
SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read())
{
Response.Write(dr["content"]);
}
}
}
第一个页面:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string str = "server =M ;uid=cxy; pwd=123;";
SqlConnection con = new SqlConnection(str);
string sql = "select * from cxy1";
SqlCommand cmd = new SqlCommand(sql, con);
cmd.CommandType = CommandType.Text;
cmd.Connection.Open();
SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read())
{
Response.Write("<a href=shownews.aspx? id="+dr["id"]+">"+dr["title"]+"</a>"+"<br/>");
}
}
}
第二个页面:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;public partial class shownews : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string idx = Request["id"];
string str = "server =M ;uid=cxy; pwd=123;";
SqlConnection con = new SqlConnection(str); string sql = "select * from cxy1 where id="idx"";
SqlCommand cmd = new SqlCommand(sql, con);
cmd.CommandType = CommandType.Text;
cmd.Connection.Open();
SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read())
{
Response.Write(dr["content"]);
}
}
}
不过还是有点问题string sql = "select * from cxy1 where id="+idx"";
这句话 这样写 为什么 还总是出现 ""错误这样的问题
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string sql = "select * from cxy1 where id=+idx";
但真让人苦笑不得
它又会出现 这样的错误第 1 行: '=' 附近有语法错误。
说明: 执行当前 Web 请求期间,出现未处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.Data.SqlClient.SqlException: 第 1 行: '=' 附近有语法错误。源错误:
行 27: cmd.CommandType = CommandType.Text;
行 28: cmd.Connection.Open();
行 29: SqlDataReader dr = cmd.ExecuteReader();
行 30:
行 31: while (dr.Read())
当 where id = 1 这样的数字时 就没错误啦
为什么呢?