C# asp.net gridview动态绑定
我有一个网格视图C# asp.net gridview动态绑定,c#,asp.net,gridview,paging,page-index-changed,C#,Asp.net,Gridview,Paging,Page Index Changed,我有一个网格视图 <asp:GridView ID="managerList" runat="server" DataSourceID="SqlDataSource2"> 当我加载页面时,它工作正常,分页也工作正常 然后我想通过单击搜索按钮获得列表的子集: protected void btnSearch_Click(object sender, EventArgs e) { SqlDataSource2.SelectCommand = "select * from man
<asp:GridView ID="managerList" runat="server" DataSourceID="SqlDataSource2">
当我加载页面时,它工作正常,分页也工作正常
然后我想通过单击搜索按钮获得列表的子集:
protected void btnSearch_Click(object sender, EventArgs e)
{
SqlDataSource2.SelectCommand = "select * from manager where age > 30";
managerList.DataBind();
}
很好,给我列表的子集
然而,当我点击“下一页”时,它会给我整个列表,第2页。我知道这是因为它发送回发,并绑定原始的select命令。但是,当我点击“下一页”时,我如何才能给出列表的子集呢
谢谢大家!
更新:
如果我将代码更改为:
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
SqlDataSource2.SelectCommand = "select * from manager";
managerList.AllowPaging = true;
}
}
当我点击“下一页”时,它会给我一个空列表
它可能试图添加IsPostBack,但这不起作用。每次加载页面(包括回发)时都会触发Page\u Load,因此select语句将被重置。尝试设置viewstate值以保留select语句。每次加载页面(包括回发)时都会触发页面加载,因此select语句将被重置。尝试设置viewstate值以保留select语句。下面的内容可能会对您有所帮助
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SqlDataSource2.SelectCommand = "select * from manager";
managerList.AllowPaging = true;
}
}
下面可能会帮助你
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SqlDataSource2.SelectCommand = "select * from manager";
managerList.AllowPaging = true;
}
}
你需要把你的代码放在
下面!页面加载事件中的IsPostBack()
。像
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
SqlDataSource2.SelectCommand = "select * from manager";
managerList.AllowPaging = true;
}
}
原因:每当您点击“下一步”按钮时,页面加载事件将在Gridview的
PageIndexchange
事件处理程序之前调用。您需要将代码置于下!页面加载事件中的IsPostBack()
。像
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
SqlDataSource2.SelectCommand = "select * from manager";
managerList.AllowPaging = true;
}
}
原因:每当单击“下一步”按钮时,页面加载事件都会在Gridview的
PageIndexChange
事件处理程序之前调用。在PageIndexChange事件中添加新的PageIndex代码:
managerList.PageIndex = e.NewPageIndex;
bindgrid();
在PageIndexChange事件中添加NewPageIndex代码:
managerList.PageIndex = e.NewPageIndex;
bindgrid();
将最近的SQL查询存储在全局静态字符串中,然后使用以下代码
static String previousSQL_Query;
protected void Page_Load(object sender, EventArgs e)
{
if(IsPostBack)
{
SqlDataSource2.SelectCommand = previousSQL_Query;
}
else
{
SqlDataSource2.SelectCommand = "select * from manager";
managerList.AllowPaging = true;
}
}
protected void btnSearch_Click(object sender, EventArgs e)
{
SqlDataSource2.SelectCommand = "select * from manager where age > 30";
previousSQL_Query = SqlDataSource2.SelectCommand;
managerList.DataBind();
}
将最近的SQL查询存储在全局静态字符串中,然后使用以下代码
static String previousSQL_Query;
protected void Page_Load(object sender, EventArgs e)
{
if(IsPostBack)
{
SqlDataSource2.SelectCommand = previousSQL_Query;
}
else
{
SqlDataSource2.SelectCommand = "select * from manager";
managerList.AllowPaging = true;
}
}
protected void btnSearch_Click(object sender, EventArgs e)
{
SqlDataSource2.SelectCommand = "select * from manager where age > 30";
previousSQL_Query = SqlDataSource2.SelectCommand;
managerList.DataBind();
}
不会的。当我单击“下一页”时,它会给我一个空列表。受保护的void managerList_PageIndexChanging(对象发送者,GridViewPageEventArgs e){managerList.PageIndex=e.NewPageIndex;bindgrid();}不会。当我单击“下一页”时,它会给我一个空列表。受保护的void managerList_PageIndexChanging(对象发送者,GridViewPageEventArgs e){managerList.PageIndex=e.NewPageIndex;bindgrid();}