嗷嗷急,关于DropDownList1的显示问题

Question

to 楼上:我只想显示跟我Dropdownlist1里面对应的项,如果ADD的话不就又增加了嘛

Answer 1

这是用CheckBoxList从数据中读取，大致都一样
this.Cblnews.DataSource=tbnews;
this.Cblnews.DataTextField="cat_name";
this.Cblnews.DataValueField="cat_id";
this.Cblnews.DataBind();

Answer 2

try:
ddl.CleanSelection();
ListItem _item=ddl.Items.FindByText("abc");
if (_item!=null)
    _item.Selected=true;

Answer 3

sql = "select colA,colB from table1";
DataSet ds = yourGetDataSet(sql);
Dropdownlist1.DataTextField="colA" ;  //显示的字段
Dropdownlist1.DataValueField="colB" ;  //VALUE的字段
Dropdownlist1.DataBind();

Answer 4

DropDownList1.SelectedItem  = DropDownList1.Items.FindByText("a")

Answer 5

string d=dreader[8].ToString();for(int i=0;i<DropDownList1.Items.Count;i++)
{
    if(DropDownList1.Items[i].Value.Trim()==d.Trim())
    {
        DropDownList1.SelectedIndex=-1;
        DropDownList1.Items[i].Selected=true;
    }
}

Answer 6

==>怎么才能用DropDownList1来显示我从数据库里读出来的值.
如下:
   string d=dreader[8].ToString();
   DropDownList1.SelectedValue=d;
就可以實現了!

Answer 7

Dropdownlist1.Items.clear();
Dropdownlist1.Items.add(d);

Answer 8

DropDownList1.Selectedindex  = DropDownList1.Items.indexof（DropDownList1.Items.FindByvalue（dreader[8].ToString()））；
就可以了。

Answer 9

datareader+for循環+dropdownlist.item.add

Answer 10

试试下面这句咱样?
for(int i=0;i<3;i++)
    if(DropDownList1.Items[i].Value==d)
         DropDownList1.SelectedIndex=i;