哪位好心的大虾帮我看下这段代码哪错了啊。..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 Ex09_05 : System.Web.UI.Page
{
protected SqlConnection myConnection = new SqlConnection(); protected void BindData()
{
//留言者的留言情况
string selCmd1 = "select * from Ex09_GuestBook where PostID="+postID;
SqlDataAdapter da1 = new SqlDataAdapter(selCmd1, myConnection);
//留言者的所有回复者情况
string selCmd2 = "select * from Ex09_GuestBook where ParentID="+postID;
SqlDataAdapter da2 = new SqlDataAdapter(selCmd2, myConnection);
DataSet ds = new DataSet();
da1.Fill(ds, "host");
da2.Fill(ds, "guest");
//留言者的主题
Label1.Text = ds.Tables["host"].Rows[0][4].ToString();
//留言者的回复次数
int reCount = ds.Tables["guest"].Rows.Count;
Label2.Text = reCount.ToString();
//留言者的发表时间
Label3.Text = ds.Tables["host"].Rows[0][2].ToString();
//留言内容
Label4.Text = ds.Tables["host"].Rows[0][4].ToString();
//留言的作者,并将作者的UserName作为参数传到Ex09_06.aspx
HyperLink1.Text = ds.Tables["host"].Rows[0][3].ToString();
HyperLink1.NavigateUrl = "Ex09_06.aspx?UserName=" + HyperLink1.Text;
//绑定数据
DataList1.DataSource = ds;
DataList1.DataMember = "guest";
DataList1.DataBind();
this.DataBind();
myConnection.Close();
}
protected void Page_Load(object sender, EventArgs e)
{
if (Session.Count == 0)//访问者未登陆
Response.Redirect("Ex09_01.aspx");
else//访问者已登陆
{ if (!IsPostBack)
{
postID = Request["PostID"]; string strConn = "server=localhost;uid=sa;pwd=;database=Aspnet";
myConnection.ConnectionString = strConn;
BindData();
}
}
}
protected void DataList1_SelectedIndexChanged(object sender, EventArgs e)
{ }
protected void TextBox1_TextChanged(object sender, EventArgs e)
{ }
protected void DataList1_SelectedIndexChanged1(object sender, EventArgs e)
{ }
}
下面是错误消息:
D:\C#\WebSite1\Ex09_05.aspx.cs(20,71): 错误 CS0103: 当前上下文中不存在名称“postID”
D:\C#\WebSite1\Ex09_05.aspx.cs(23,73): 错误 CS0103: 当前上下文中不存在名称“postID”
D:\C#\WebSite1\Ex09_05.aspx.cs(56,17): 错误 CS0103: 当前上下文中不存在名称“postID”
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 Ex09_05 : System.Web.UI.Page
{
protected SqlConnection myConnection = new SqlConnection(); protected void BindData()
{
//留言者的留言情况
string selCmd1 = "select * from Ex09_GuestBook where PostID="+postID;
SqlDataAdapter da1 = new SqlDataAdapter(selCmd1, myConnection);
//留言者的所有回复者情况
string selCmd2 = "select * from Ex09_GuestBook where ParentID="+postID;
SqlDataAdapter da2 = new SqlDataAdapter(selCmd2, myConnection);
DataSet ds = new DataSet();
da1.Fill(ds, "host");
da2.Fill(ds, "guest");
//留言者的主题
Label1.Text = ds.Tables["host"].Rows[0][4].ToString();
//留言者的回复次数
int reCount = ds.Tables["guest"].Rows.Count;
Label2.Text = reCount.ToString();
//留言者的发表时间
Label3.Text = ds.Tables["host"].Rows[0][2].ToString();
//留言内容
Label4.Text = ds.Tables["host"].Rows[0][4].ToString();
//留言的作者,并将作者的UserName作为参数传到Ex09_06.aspx
HyperLink1.Text = ds.Tables["host"].Rows[0][3].ToString();
HyperLink1.NavigateUrl = "Ex09_06.aspx?UserName=" + HyperLink1.Text;
//绑定数据
DataList1.DataSource = ds;
DataList1.DataMember = "guest";
DataList1.DataBind();
this.DataBind();
myConnection.Close();
}
protected void Page_Load(object sender, EventArgs e)
{
if (Session.Count == 0)//访问者未登陆
Response.Redirect("Ex09_01.aspx");
else//访问者已登陆
{ if (!IsPostBack)
{
postID = Request["PostID"]; string strConn = "server=localhost;uid=sa;pwd=;database=Aspnet";
myConnection.ConnectionString = strConn;
BindData();
}
}
}
protected void DataList1_SelectedIndexChanged(object sender, EventArgs e)
{ }
protected void TextBox1_TextChanged(object sender, EventArgs e)
{ }
protected void DataList1_SelectedIndexChanged1(object sender, EventArgs e)
{ }
}
下面是错误消息:
D:\C#\WebSite1\Ex09_05.aspx.cs(20,71): 错误 CS0103: 当前上下文中不存在名称“postID”
D:\C#\WebSite1\Ex09_05.aspx.cs(23,73): 错误 CS0103: 当前上下文中不存在名称“postID”
D:\C#\WebSite1\Ex09_05.aspx.cs(56,17): 错误 CS0103: 当前上下文中不存在名称“postID”
string postID = Request["PostID"];
D:\C#\WebSite1\Ex09_05.aspx.cs(23,73): 错误 CS0103: 当前上下文中不存在名称“postID”
还有两个。..郁闷了
D:\C#\WebSite1\Ex09_05.aspx.cs(23,73): 错误 CS0103: 当前上下文中不存在名称“postID”
还有两个。..郁闷了
protected void BindData()
{
//留言者的留言情况
string selCmd1 = "select * from Ex09_GuestBook where PostID="+postID; 改成:
private string postID = "";
protected void BindData()
{
//留言者的留言情况
string selCmd1 = "select * from Ex09_GuestBook where PostID="+postID; 然后把我4楼说的修改给撤销回去,也就是说把:string postID = Request["PostID"];
还原成postID = Request["PostID"]; 就可以了