我写了下面一段代码,实现了我的需求,特记录下来,以备不时之需:if (Page.IsValid)string key = txtKey.Text.Trim();/关键字foreach (ListItem li in cblUser.Items)/遍历checkboxlistli.Selected = false;string str = li.Text;/要匹配的字串int len = key.Length;/关键字的长度int n = str.Length - len;for (int i = 0; i = n; i+)/从第一位开始查找是否与关键字匹配,如果是则选中并退出循环if (str.Substring(i, len).Equals(key)li.Selected = true;break;/if (li.Text.Trim().Equals(key)/ li.Selected = true;/