|
|
if (!IsPostBack)
{
//一級(jí)分類(lèi)列表
this.DropDownList1.DataSource = dsbb.SelectSubjct1();
this.DropDownList1.DataTextField = "cName";
this.DropDownList1.DataValueField = "Ccode";
this.DropDownList1.DataBind();
this.DropDownList1.Items.Insert(0,new ListItem("請(qǐng)選擇一級(jí)分類(lèi)","0"));
this.DropDownList8.Items.Insert(0, new ListItem("請(qǐng)選擇二級(jí)分類(lèi)", "0"));
this.DropDownList9.Items.Insert(0,new ListItem ("請(qǐng)選擇三級(jí)分類(lèi)","0"));
//二級(jí)分類(lèi)列表
}
/// <summary>
/// 綁定二級(jí)分類(lèi)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
libs.Database.Dbbase dbb = new libs.Database.Dbbase();
if (Convert.ToInt32(this.DropDownList1.SelectedValue) == 0) //清除列表內(nèi)容
{
this.DropDownList8.Items.Clear();
this.DropDownList8.Items.Insert(0, new ListItem("請(qǐng)選擇二級(jí)分類(lèi)", "0"));
this.DropDownList9.Items.Clear();
this.DropDownList9.Items.Insert(0, new ListItem("請(qǐng)選擇三級(jí)分類(lèi)", "0"));
}
else //二級(jí)分類(lèi)列表
{
this.DropDownList8.DataSource = dbb.Selectsubjct2(this.DropDownList1.SelectedValue.Substring(0,2));
this.DropDownList8.DataTextField = "cName";
this.DropDownList8.DataValueField = "Ccode";
this.DropDownList8.DataBind();
this.DropDownList8.Items.Insert(0,new ListItem ("請(qǐng)選擇二級(jí)分類(lèi)","0"));
this.DropDownList9.Items.Clear();//清除第三分類(lèi)
this.DropDownList9.Items.Insert(0, new ListItem("請(qǐng)選擇三級(jí)分類(lèi)", "0"));
}
}
/// <summary>
/// 綁定三級(jí)分類(lèi)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void DropDownList8_SelectedIndexChanged(object sender, EventArgs e)
{
libs.Database.Dbbase dbase = new libs.Database.Dbbase();
this.DropDownList9.DataSource = dbase.selectsubject3(this.DropDownList8.SelectedValue.Substring(0,4));
this.DropDownList9.DataTextField = "cName";
this.DropDownList9.DataValueField = "Ccode";
this.DropDownList9.DataBind();
this.DropDownList9.Items.Insert(0,new ListItem("請(qǐng)選擇三級(jí)分類(lèi)","0"));
}
Dbbase.cs頁(yè)：
復(fù)制代碼 代碼如下:
/// <summary>
/// 查詢(xún)一級(jí)欄目
/// </summary>
/// <returns></returns>
public DataSet SelectSubjct1()
{
string con = System.Configuration.ConfigurationSettings.AppSettings["sqlconn"];
SqlConnection conn = new SqlConnection(con);
string sqlstr = "SELECT kndid, Ccode, cName, cLevel FROM kind WHERE cLevel = 1";
DataSet dst = new DataSet();
SqlDataAdapter sda = new SqlDataAdapter(sqlstr,conn);
try
{
sda.Fill(dst);
return dst;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
conn.Close();
}
}
/// <summary>
/// 查詢(xún)二級(jí)欄目?jī)?nèi)容
/// </summary>
/// <param name="ccode"></param>
/// <returns></returns>
public DataSet Selectsubjct2(string ccode)
{
string conn1 = System.Configuration.ConfigurationSettings.AppSettings["sqlconn"];
SqlConnection conn = new SqlConnection(conn1);
string sqqq = "select kndid,Ccode,cName,cLevel from kind where cLevel = 2 and Ccode like '" + ccode + "%'";
DataSet dss = new DataSet();
SqlDataAdapter sdd = new SqlDataAdapter(sqqq,conn);
try
{
sdd.Fill(dss);
return dss;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
conn.Close();
}
}
/// <summary>
/// 查詢(xún)?nèi)?jí)欄目?jī)?nèi)容
/// </summary>
/// <param name="cde"></param>
/// <returns></returns>
public DataSet selectsubject3(string cde)
{
string conn2 = System.Configuration.ConfigurationSettings.AppSettings["sqlconn"];
SqlConnection conn = new SqlConnection(conn2);
string sqq = "select kndid,Ccode,cName,cLevel from kind where cLevel = 3 and Ccode like '" + cde + "%'";
DataSet dst = new DataSet();
SqlDataAdapter sdaa = new SqlDataAdapter(sqq,conn);
try
{
sdaa.Fill(dst);
return dst;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
conn.Close();
}
}
注意：DropDownList1_SelectedIndexChanged 事件，AutoPostBack="True"
AspNet技術(shù)：asp.net DropDownList 三級(jí)聯(lián)動(dòng)下拉菜單實(shí)現(xiàn)代碼，轉(zhuǎn)載需保留來(lái)源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請(qǐng)第一時(shí)間聯(lián)系我們修改或刪除，多謝。
