Question

就如何搞DropdownList去控制数据库，从而数据库的一个表的内容显示在DataList内呢？

protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
{

Bind();
Panel1.Visible = true;

}
private void Bind()
{

string str = DropDownList1.SelectedValue.ToString();

SqlConnection myconn2 = new SqlConnection(ConfigurationManager.AppSettings["constrx2"].ToString());
myconn2.Open();
string sqlstr2 = "select q.* from question q,Course c where q.courseID=c.courseID and c.courseName='" + str + "'";
SqlDataAdapter myda = new SqlDataAdapter(sqlstr2, myconn2);
DataSet myds = new DataSet();
myda.Fill(myds, "table");
DataList1.DataKeyField = "questionID";
// DataList1.DataSource = myds.Tables["table"];
DataList1.DataBind();
myda.Dispose();
myds.Dispose();
myconn2.Close();

}





Answer 1

你要写事件委托函数代码?那和其它控件没有区别啊。 你如果想找到第index个Item的DropDownList,可以在代码中 DropDownList ddl=(DropDownList)DataList1.Items[index].FindControl("DropDownList1");

追问

是，具体是放在那个位置呢？放在 DropDownList1_SelectedIndexChanged1里吗？