我采用了<select>onchange()事件，触发动态创建table,在创建table的时候为什么从数据库读取了两遍数据呢
代码如下：
protected void articleType_SelectedIndexChanged(object sender, System.EventArgs e)
{
SqlConnection conn1 = new SqlConnection(ConfigurationSettings.AppSettings["connstring"]);
conn1.Open();
string articleTypeId = this.articleType.SelectedValue;
SqlCommand articleCmd1 = new SqlCommand("select * from Article where Type="+articleTypeId,conn1);
SqlDataReader articleSdr1 = articleCmd1.ExecuteReader();
while(articleSdr1.Read())
{
TableRow r = new TableRow();
TableCell c1 = new TableCell();
c1.Controls.Add(new LiteralControl(articleSdr1[1].ToString()));
r.Cells.Add(c1);
TableCell c2 = new TableCell();
c2.Controls.Add(new LiteralControl("<input type='radio' value='"+articleSdr1[0].ToString()+"'> "));
r.Cells.Add(c2);
articleTable.Rows.Add(r);

}

}

[此贴子已经被作者于2007-1-10 14:16:57编辑过]

其实我不明白你为什么要把绑定写到SelectedIndexChanged事件里面..

我是新手 对.net还不是很熟悉 对于这样的效果我还不是很清楚怎样做最好
这个功能就是根据一个文章类型的下拉菜单，选择一个类型，下面就会出现该类型对应的文章，并且要带单选按钮便于选择
请版主指点 谢谢

这样也是内容显示了两遍 为什么呢？版主一定要帮帮我啊
protected void articleType_SelectedIndexChanged(object sender, System.EventArgs e)
{
SqlConnection conn1 = new SqlConnection(ConfigurationSettings.AppSettings["connstring"]);
conn1.Open();
string articleTypeId = this.articleType.SelectedValue;
SqlDataAdapter articleCmd1 = new SqlDataAdapter("select * from Article where Article_Type="+articleTypeId,conn1);
DataSet ds = new DataSet();
articleCmd1.Fill(ds,"Article");
foreach(DataRow Article in ds.Tables[ "Article" ].Rows)
{
TableRow articleR = new TableRow();
TableCell articleC = new TableCell();
articleC.Controls.Add(new LiteralControl(Article["Article_Title"]+"<br>"+Article["Article_Content"]));
articleR.Cells.Add(articleC);
TableCell articleC2 = new TableCell();
articleC2.Controls.Add(new LiteralControl("<input type='radio' value='"+Article["Article_Id"]+"'> "));
articleR.Cells.Add(articleC2);
articleTable.Rows.Add(articleR);

}

}

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!this.IsPostBack)
{
SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["connstring"]);
conn.Open();

//查询文章类型
SqlCommand articleTypeCmd = new SqlCommand("select * from ArticleType Order By Type_Id",conn);
SqlDataReader articleTypeSdr = articleTypeCmd.ExecuteReader();
articleType.DataSource = articleTypeSdr;
articleType.DataTextField ="Type_Name" ;
articleType.DataValueField="Type_Id";
articleType.DataBind();
articleTypeSdr.Close();

//查询文章类型所对应的文章
SqlCommand articleCmd = new SqlCommand("select * from Article where Article_Type="+this.articleType.SelectedValue,conn);
SqlDataReader articleSdr = articleCmd.ExecuteReader();
while(articleSdr.Read())
{
TableRow r = new TableRow();
TableCell c = new TableCell();
c.Controls.Add(new LiteralControl("<input name='articleId' type='radio' value='"+articleSdr[0]+"'> "+articleSdr[1].ToString()));
r.Cells.Add(c);
articleTable.Rows.Add(r);
}
articleSdr.Close();

}
}