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<body>
<form id="form1" runat="server">
<div>
<asp:CheckBox ID="CheckBox1" runat="server" />
<asp:Button ID="Button1" runat="server"
Text="Button" onclick="Button1_Click" />
</div>
</form>
</body>
protected void Page_Load(object sender, EventArgs e)
{
if(this.IsPostBack==true)
CheckBox1.Checked = true;
}
protected void Button1_Click(object sender, EventArgs e)
{
if (CheckBox1.Checked) Response.Write("Checked");
else Response.Write("NO");
}
if(!this.IsPostBack)
CheckBox1.Checked = true;
这样写,这样的话,你取消选中状态,提交的时候就再是原先的选中状态了