ListBox，CheckBoxList，DropDownList，RadioButtonList的常见用法
四个都是选择控件，用法大同小异，基本都是指定键值对：
直接加选择项：
void way1()
{
DropDownList1.Items.Add("c#");
DropDownList1.Items.Add("vb");
DropDownList1.Items.Add("c");
DropDownList1.Items.Add("java");
ListBox1.Items.Add("c#");
ListBox1.Items.Add("VB");
ListBox1.Items.Add("C++");
ListBox1.Items.Add("JAVA");
CheckBoxList1.Items.Add("c#");
CheckBoxList1.Items.Add("VB");
CheckBoxList1.Items.Add("javascript");
CheckBoxList1.Items.Add("php");
RadioButtonList1.Items.Add("asp");
RadioButtonList1.Items.Add("php");
RadioButtonList1.Items.Add("jsp");
RadioButtonList1.Items.Add("ajax");
}
哈斯表法：
void way2()
{
Hashtable ht=new Hashtable();
ht.Add("1","c#");
ht.Add("2","C++");
ht.Add("3","php");
ht.Add("4","CGI");
this.DropDownList2.DataSource=ht;
DropDownList2.DataTextField="Value";
DropDownList2.DataValueField="Key";
DropDownList2.DataBind();
this.ListBox2.DataSource=ht;
ListBox2.DataTextField="value";
ListBox2.DataValueField="key";
ListBox2.DataBind();
this.CheckBoxList2.DataSource=ht;
CheckBoxList2.DataTextField="value";
CheckBoxList2.DataValueField="key";
CheckBoxList2.DataBind();
this.RadioButtonList2.DataSource=ht;
RadioButtonList2.DataTextField="value";
RadioButtonList2.DataValueField="key";
RadioButtonList2.DataBind();
}
SortedList方法：
void way3()
{
SortedList s1=new SortedList();
s1.Add("1","haha");
s1.Add("2","hehe");
s1.Add("3","xixi");
s1.Add("4","heihei");
this.DropDownList3.DataSource=s1;
DropDownList3.DataTextField="value";
DropDownList3.DataValueField="key";
DropDownList3.DataBind();
}
用数据对象dataread方法：
void way4()
{
OleDbConnection cn=new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+Server.MapPath("sailing.mdb")+";Persist Security Info=False");
cn.Open();
OleDbCommand cmd=new OleDbCommand();
cmd.Connection=cn;
cmd.CommandText="select RoleName,RoleID from Role";
OleDbDataReader dr=cmd.ExecuteReader();
while(dr.Read())
{
ListItem li=new ListItem(dr[0].ToString(),dr[1].ToString());
this.ListBox4.Items.Add(li);
}
dr.Close();
cn.Close();
}
用数据集法：
OleDbConnection cn=new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+Server.MapPath("sailing.mdb")+";Persist Security Info=False");
cn.Open();
OleDbCommand cmd=new OleDbCommand();
cmd.Connection=cn;
cmd.CommandText="select RoleName,RoleID from Role";
OleDbDataAdapter adp=new OleDbDataAdapter(cmd);
DataSet ds=new DataSet();
adp.Fill(ds);
this.CheckBoxList4.DataSource=ds.Tables[0];
this.CheckBoxList4.DataTextField=ds.Tables[0].Columns[0].ToString();
this.CheckBoxList4.DataValueField=ds.Tables[0].Columns[1].ToString();
this.CheckBoxList4.DataBind();
还有一种数组法：
<%@ Page Language="C#" AutoEventWireup="True" %>
<Script language="C#" runat="server">
void Page_Load(Object Sender,EventArgs e)
{
ArrayList array=new ArrayList();
array.Add("Windows");
array.Add("Linux");
array.Add("unix");
CheckBox_1.DataSource=array;
CheckBox_1.DataBind();
RadioList_1.DataSource=array;
RadioList_1.DataBind();
}
</Script>
<form id="Form_1" runat="server">
<ASP:checkboxList ID="CheckBox_1" runat="server"/>
<input id="Button_1" type="Button" value="CheckButton" runat="server"/>
<asp:radiobuttonlist ID="RadioList_1" runat="server"/>
<input id="Button_2" type="Button" value="RadioButton" runat="server"/>
</form>