C# 有条件地显示隐藏 asp.net Gridview 列
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conditionally show hide asp.net Gridview column
提问by zey
This is how I navigate to myPage.aspx,
这就是我导航到的方式myPage.aspx，
<a href='~/myPage.aspx?show=<%#Eval("id")%>' id="showEach" runat="server">Show Each</a>
<a href="~/myPage.aspx?show=all" id="showAll" runat="server">Show All</a>
And I have a gridview in myPage.aspx
我有一个网格视图 myPage.aspx
<asp:GridView ID="GridView1" runat="server">
<Columns>
<asp:BoundField HeaderText="ColumnOne" Visible="true"/>
<asp:BoundField HeaderText="ColumnTwo" Visible="true"/>
</Columns>
</asp:GridView>
What I want to do is , if Query String is equal to all(~/myPage.aspx?show=all) , I want to set GridView1's Column2's visible to true , else , set visible to false .
How can I do it ?
我想要做的是，如果查询字符串等于all(~/myPage.aspx?show=all) ，我想将 GridView1 的Column2可见设置为 true ，否则，将可见设置为 false 。
我该怎么做 ？
采纳答案by ????
you can use gridview column index to hide the particular column
您可以使用 gridview 列索引来隐藏特定列
Code could be
代码可能是
if(Request.QueryString.Get("show")=="all")
GridView1.Columns[1].Visible=true;
else
GridView1.Columns[1].Visible=false;
More detail
更多详情
Edit 1
编辑 1
I think yes
我想是的
<asp:BoundField HeaderText="ColumnTwo"
Visible='<% if (Request.QueryString.Get("all") == "all" ) "true" else "false" %>'/>
You will have to check for the syntex
你将不得不检查语法
Edit 2
编辑 2
Try this
尝试这个
Visible='<% Request.QueryString.Get("all") == "all"? "true": "false"%>'
Edit 3
编辑 3
Can not be done directly.
不能直接做。
<%= %> outputs directly to the response stream, and the asp markup is not part of the response stream. Its a mistake to assume the <%= %> operators are performing any kind of preprocessing on the asp markup.
<%= %> 直接输出到响应流，asp 标记不是响应流的一部分。假设 <%= %> 运算符对 asp 标记执行任何类型的预处理是错误的。
More explanation
更多解释
Why will <%= %> expressions as property values on a server-controls lead to a compile errors?
回答by Amit Singh
You can use gridview pre-render method to set this...
您可以使用 gridview 预渲染方法来设置此...
protected void GridView_PreRender(object sender, EventArgs e)
{
if(Reqest.QueryString["Id"]=="all"&& Reqest.QueryString["Id"]!=null)
{
GridViewId.Columns[1].Visible = true;
}
else
GridViewId.Columns[1].Visible = false;
}
回答by Rahul
Dear try to use RowDataBoundevent of Grid View like
亲爱的尝试使用Grid View 的RowDataBound事件，例如
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//here apply your condition
if(Request.QueryString["name"] == "all")
e.Row.Cells[<index_of_cell>].Visible = true;
else
e.Row.Cells[<index_of_cell>].Visible = false;
}
}
Try something like that.
尝试这样的事情。
Hope it works for you.
希望对你有效。
