C# 如何让 Gridview 渲染 THEAD？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/309101/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How do I get Gridview to render THEAD?
提问by Andrew Bullock
How do I get the GridViewcontrol to render the <thead><tbody>tags? I know .UseAccessibleHeadersmakes it put <th>instead of <td>, but I cant get the <thead>to appear.
如何获得GridView渲染<thead><tbody>标签的控件？我知道.UseAccessibleHeaders让它 put<th>而不是<td>，但我无法让它<thead>出现。
采纳答案by Phil Jenkins
This should do it:
这应该这样做：
gv.HeaderRow.TableSection = TableRowSection.TableHeader;
回答by ASalvo
The code in the answer needs to go on Page_Loador GridView_PreRender. I put it in a method that was called after Page_Loadand got a NullReferenceException.
答案中的代码需要继续Page_Load或GridView_PreRender。我把它放在一个被调用的方法中，Page_Load并得到了一个NullReferenceException.
回答by Rajpurohit
Create a function and use that function in your PageLoadevent like this:
创建一个函数并在您的PageLoad事件中使用该函数，如下所示：
The function is:
功能是：
private void MakeGridViewPrinterFriendly(GridView gridView) {
if (gridView.Rows.Count > 0) {
gridView.UseAccessibleHeader = true;
gridView.HeaderRow.TableSection = TableRowSection.TableHeader;
}
}
The PageLoadevent is:
该PageLoad事件是：
protected void Page_Load(object sender, EventArgs e) {
if (!IsPostBack)
{
MakeGridViewPrinterFriendly(grddata);
}
}
回答by MikeTeeVee
I use the following code to do this:
我使用以下代码来做到这一点：
The ifstatements I added are important.
if我添加的陈述很重要。
Otherwise (depending on how you render your grid) you'll throw exceptions like:
否则（取决于你如何渲染你的网格）你会抛出如下异常：
The table must contain row sections in order of header, body and then footer.
表格必须包含按页眉、正文和页脚顺序排列的行部分。
protected override void OnPreRender(EventArgs e)
{
if ( (this.ShowHeader == true && this.Rows.Count > 0)
|| (this.ShowHeaderWhenEmpty == true))
{
//Force GridView to use <thead> instead of <tbody> - 11/03/2013 - MCR.
this.HeaderRow.TableSection = TableRowSection.TableHeader;
}
if (this.ShowFooter == true && this.Rows.Count > 0)
{
//Force GridView to use <tfoot> instead of <tbody> - 11/03/2013 - MCR.
this.FooterRow.TableSection = TableRowSection.TableFooter;
}
base.OnPreRender(e);
}
The thisobject is my GridView.
该this对象是我的 GridView。
I actually overrode the Asp.net GridView to make my own custom control, but you could paste this into your aspx.cspage and reference the GridView by name instead of using the custom-gridview approach.
我实际上覆盖了 Asp.net GridView 来制作我自己的自定义控件，但是您可以将其粘贴到您的aspx.cs页面中并按名称引用 GridView，而不是使用自定义 gridview 方法。
FYI: I haven't tested the footer logic, but I do know this works for Headers.
仅供参考：我还没有测试过页脚逻辑，但我知道这适用于页眉。
回答by Felipe Delgado
This works for me:
这对我有用：
protected void GrdPagosRowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.TableSection = TableRowSection.TableBody;
}
else if (e.Row.RowType == DataControlRowType.Header)
{
e.Row.TableSection = TableRowSection.TableHeader;
}
else if (e.Row.RowType == DataControlRowType.Footer)
{
e.Row.TableSection = TableRowSection.TableFooter;
}
}
This was tried in VS2010.
这是在 VS2010 中尝试过的。
回答by Neto Kuhn
I use this in OnRowDataBoundevent:
我在OnRowDataBound事件中使用它：
protected void GridViewResults_OnRowDataBound(object sender, GridViewRowEventArgs e) {
if (e.Row.RowType == DataControlRowType.Header) {
e.Row.TableSection = TableRowSection.TableHeader;
}
}
回答by Jonathan Harris
I know this is old, but, here's an interpretation of MikeTeeVee's answer, for a standard gridview:
我知道这是旧的，但是，这是对标准网格视图的 MikeTeeVee 答案的解释：
aspx page:
aspx页面：
<asp:GridView ID="GridView1" runat="server"
OnPreRender="GridView_PreRender">
aspx.cs:
aspx.cs：
protected void GridView_PreRender(object sender, EventArgs e)
{
GridView gv = (GridView)sender;
if ((gv.ShowHeader == true && gv.Rows.Count > 0)
|| (gv.ShowHeaderWhenEmpty == true))
{
//Force GridView to use <thead> instead of <tbody> - 11/03/2013 - MCR.
gv.HeaderRow.TableSection = TableRowSection.TableHeader;
}
if (gv.ShowFooter == true && gv.Rows.Count > 0)
{
//Force GridView to use <tfoot> instead of <tbody> - 11/03/2013 - MCR.
gv.FooterRow.TableSection = TableRowSection.TableFooter;
}
}
回答by Michael
You can also use jQuery to add it. This avoids the problem with TableRowSection.TableHeader where gets dropped on PostBack.
您也可以使用 jQuery 来添加它。这避免了 TableRowSection.TableHeader 在 PostBack 时被丢弃的问题。
$('#myTableId').prepend($("<thead></thead>").append($(this).find("#myTableId tr:first")));
$('#myTableId').prepend($("<thead></thead>").append($(this).find("#myTableId tr:first")));
