点击复制TextBoxt内容

// 复制学生信息
private void CopyStudentInfo()
{
      string studetnInfo;
      studetnInfo = "学生姓名：" + lblStudentName.Text + "\\r\\n" +  "性别：" + ddlSex.SelectValue.ToString() + "\\r\\n" + "个人情况说明：" + txtStudentInfo.text.ToString().Trim();              
 
      this.btnCopyStudentInfo.Attributes.Add("onclick", @"javascript:window.clipboardData.setData('Text','" + studetnInfo + "')");
}