I have question how to insert CurrentPage.Children in Currentpage.getgridhtml. i see example about blog content and i get the template like this:

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage
@{
    Layout = "Master.cshtml";
}
<div class="journey section">
        <div class="container">

            <div class="row">
                @foreach(var post in CurrentPage.Children) 
                {
                    <div class="col-sm-3">
                        <div class="content equal">
                            <a href="@post.Url">
                                <div class="date">@post.CreateDate.ToLongDateString()</div>
                                <h2>@post.Name</h2>     
                                <p>@Umbraco.Truncate(post.Introduction, 240, true)</p>
                            </a>
                        </div>
                    </div>
                }
            </div>
        </div>
</div>

</div>

and i create custom template name is "category" just page content not like blog, like this :

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage
@{
    Layout = "Master.cshtml";
}
@CurrentPage.GetGridHtml("content", "category")

my trouble is how to use :

<div class="row">
                @foreach(var post in CurrentPage.Children) 
                {
                    <div class="col-sm-3">
                        <div class="content equal">
                            <a href="@post.Url">
                                <div class="date">@post.CreateDate.ToLongDateString()</div>
                                <h2>@post.Name</h2>     
                                <p>@Umbraco.Truncate(post.Introduction, 240, true)</p>
                            </a>
                        </div>
                    </div>
                }
            </div>

from blog inside @CurrentPage.GetGridHtml("content", "category") file in => "partial views->grid->category"

i try to add blog code for get child page introduction inside :

@helper renderRow(dynamic row, bool singleColumn) 
{
... // blog code for get the child
}

but i can't get the ouput.