7、PagerBtnCommand_OnClick：该方法主要用来处理设计视图页的“首页”、“下一页”，“上一页”，“尾页”，“查询”按钮的Click事件，主要通过不同按钮的CommandName属性来分别处理，需要在前台为每一个按钮相应的CommandName属性赋值，如果用户点击的是“查询”按钮，这个时候需要对查询的Sql语句进行重写，加入过滤条件，即用户输入的查询的条件
复制代码 代码如下:
/// <summary>
/// 页面按钮Click处理
/// </summary>
/// <param></param>
/// <param></param>
protected void PagerBtnCommand_OnClick(object sender, EventArgs e)
{
CurrentPage = (int)ViewState["PageIndex"];
//从ViewState中读取页码值保存到CurrentPage变量中进行参数运算
Pages = (int)ViewState["PagesCount"];//从ViewState中读取总页参数运算
Button btn = sender as Button;
string sqlResult="default";
if (btn != null)
{
string cmd = btn.CommandName;
switch (cmd)//根据不同的CommandName做出不同的处理
{
case "next":
CurrentPage++;
break;
case "prev":
CurrentPage--;
break;
case "last":
CurrentPage = Pages;
break;
case "search":
if (!string.IsNullOrEmpty(SearchName.Text))
{
RecordsCount = GetRecordsCount("select count(*) from p_user where username like '" + SearchName.Text + "%'");//获取过滤后的总记录数
PagesCount = RecordsCount / PAGESIZE + OverPage();//该变量为页总数
ViewState["PagesCount"] = RecordsCount / PAGESIZE - ModPage();//该变量为末页索引，比页总数小1
ViewState["PageIndex"] = 0;//保存一个为0的页面索引值到ViewState，页面索引从0开始
ViewState["JumpPages"] = PagesCount;
//保存PageCount到ViewState，跳页时判断用户输入数是否超出页码范围
//显示lbPageCount、lbRecordCount的状态
lbPageCount.Text = PagesCount.ToString();
lbRecordCount.Text = RecordsCount.ToString();
//判断跳页文本框失效
if (RecordsCount <= 10)
GotoPage.Enabled = false;
sqlResult = "Select Top " + PAGESIZE + "user_serialid,username,displayname,orgcode,orgname from p_user where user_serialid not in(select top " + PAGESIZE * CurrentPage + " user_serialid from p_user order by user_serialid asc) and username like '" + SearchName.Text + "%' order by user_serialid asc";
}
else
{
Response.Write("请输入您所要查找的用户姓名！");
}
break;
case "jump":
JumpPage = (int)ViewState["JumpPages"];
//从ViewState中读取可用页数值保存到JumpPage变量中
//判断用户输入值是否超过可用页数范围值
if(Int32.Parse(GotoPage.Text) > JumpPage || Int32.Parse(GotoPage.Text) <= 0)
Response.Write("<script>alert('页码范围越界！')</script>");
else
{
int InputPage = Int32.Parse(GotoPage.Text.ToString()) - 1;
//转换用户输入值保存在int型InputPage变量中
ViewState["PageIndex"] = InputPage;
CurrentPage = InputPage;
//写入InputPage值到ViewState["PageIndex"]中
sqlResult = "Select Top " + PAGESIZE + "user_serialid,username,displayname,orgcode,orgname from p_user where user_serialid not in(select top " + PAGESIZE * CurrentPage + " user_serialid from p_user order by user_serialid asc) and username like '" + SearchName.Text + "%' order by user_serialid asc";
}
break;
default:
CurrentPage = 0;
break;
}
ViewState["PageIndex"] = CurrentPage;
//将运算后的CurrentPage变量再次保存至ViewState
GridViewDataBind(sqlResult);//调用数据绑定函数TDataBind()
}
}
8、btn_Reset_Click:该方法主要用来进行重置，用户完成一次查询之后，需要重置，才能进行下一次的查询操作
复制代码 代码如下: