《一》动态绑定方法! D! p5 E w/ @& y0 G g* Q9 Y
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ddlItems.DataSource = voe.SelectItems();) T% ]7 n# D% X6 t3 {( K
ddlItems.DataTextField = "VoteItem";
9 S$ @0 v7 b, s, u+ |! WddlItems.DataValueField = "VoteId";9 \0 p: F, v1 i' r
ddlItems.DataBind();
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9 ?7 M3 w8 r5 G- c《二》添加默认项“请选择”
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方法1; X: r, r5 H- j( A
0 R- D ^) G. |! ~& j/ G绑定后添加 - Q5 C0 k z2 t V- j7 [
ListItem lt = new ListItem(); 0 q e1 d* ?+ m* M+ a$ {
lt.Text = "请选择"; 6 R( b( r2 }. R$ a- I J
lt.Value = "00"; 0 g* I) a9 Y9 D7 G
lt.Selected = true;
' q- D" s' t8 ?8 ~* r g2 vddl.Items.Add(lt);
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" Z# t- K! K1 ~) L放到databind()之后! T# {6 W* C# E; z0 Z, h3 J9 |
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方法22 [" g6 O4 U" i/ }; P2 h* m
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绑定以后添加下面代码：
8 W4 {, V& W( G8 Q0 M' h- E; aListItem it = new ListItem("请选择", "0");5 L8 l# B# X1 y) p8 L
ddl.Items.Insert(0,it);
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9 q4 L; O. q) X《三》绑定后指定第一项) ]2 A: c+ ?% U8 l: b
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ddlItems.DataSource = voe.SelectItems();" C7 [. v2 s6 E. \0 j$ W
ddlItems.DataTextField = "VoteItem";
, Q- P8 Z4 f- M0 IddlItems.DataValueField = "VoteId";0 u9 u3 f3 ^2 H. h
ddlItems.DataBind();1 a, |: g6 ?) {8 o+ [+ b# g
string str="你想要的文本";
: w y7 `1 B8 F+ y0 T9 K# qint index = this.ddl.Items.IndexOf(this.ddl.Items.FindByText(str));' E- U5 m5 h p% g: U" i }4 ~, w
ddl.SelectedIndex = index;
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《三》绑定后指定第一项* {2 n4 D% B9 P: P
/ Q/ e2 l ]! W2 HddlItems.DataSource = voe.SelectItems();
; u7 a. @% n0 T" i3 wddlItems.DataTextField = "VoteItem";& ]4 E4 B# u' g( s% d% X
ddlItems.DataValueField = "VoteId";1 {& y, `9 m! p$ p8 d# o6 l2 D3 T
ddlItems.DataBind();
$ _5 M" i. Y* F1 o9 r0 x3 e. M/ z, Ostring vID = Request.QueryString["id"];( G0 q3 h. J4 i9 p
ddl.SelectedValue= vID; |
发表于 2010-7-30 17:33:40
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