problem in drop down list in asp.net

Question

i have two dropdown list first dropdown list id is state and second list id is distic, i wanted to hide second dropdownlist and it is display only when user select any state name in first dropdownlist , and second list show the distic name according to the selected state name in first list , example i have state name like hp, punjab, delhi, up etx , and second lise have , distic name accordingly , if user select punjab than only punjab's distic name will show .
can anybody help me for this

Nitin Sharma · Answer

did not understand the meaning of dsd gdv can u please explain the logic

selvi subramanian · Answer

source --Select-- --Select-- Width=158px onclick=Button1_Click /> my code is put this code in page load string anad = select sectionname from section order by sectionname; dsd = gdv.GETDS(anad); foreach (DataRow dr in dsd.Tables[0].Rows) { int a = 0; ListItem li1 = new ListItem(); li1.Text = dr[sectionname].ToString(); li1.Value = Convert.ToString(a + 1); DropDownList1.Items.Add(li1.ToString()); } protected void DropDownList2_SelectedIndexChanged(object sender EventArgs e) { //if (!IsPostBack) //{ DataSet ddse = new DataSet(); string and = select sectionname from suplier where suppliername=' + DropDownList2.SelectedItem.ToString() + '; ddse = gdv.GETDS(and); foreach (DataRow dr in ddse.Tables[0].Rows) { int a = 0; ListItem li1 = new ListItem(); li1.Text = dr[sectionname].ToString(); li1.Value = Convert.ToString(a + 1); DropDownList3.Items.Add(li1.ToString()); } // } }