Dropdownlist1.DataSource = ds;
Dropdownlist1.DataTextField = "province";
Dropdownlist1.DataValueField = "leter";
Dropdownlist1.DataBind(); 我帮定以后默认是第一条怎么能让它默认为空就是不选中状态
Dropdownlist1.DataTextField = "province";
Dropdownlist1.DataValueField = "leter";
Dropdownlist1.DataBind(); 我帮定以后默认是第一条怎么能让它默认为空就是不选中状态
itemNull.Text = string.Empty;
itemNull.Index = -1;ddl.Items.Add(itemNull);
itemNull.Text = string.Empty;
itemNull.Value = -1;ddl.Items.Add(itemNull);应该是这样,sorry
Dropdownlist1.DataValueField = "leter";
Dropdownlist1.DataBind();
itemNull.Text = "请选择...";
itemNull.Index = -1;ddl.Items.Add(itemNull);
ddl.Items.Insert(0,new ListItem("请选择 ","-1"));
然后,关键是DropDownList的AppendDataBoundItems:True
lz cam solve your problem!