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7.9

Pager calculation

Asked by sammy1971 in C# Programming Language, Microsoft Visual C#.Net, Programming for ASP.NET

Tags: C#, Asp.Net

Hi guys,
I am trying to create a pager helper based on number of rows
I can do all paging Ok but If I have a 100 the pager would render the numbers 1 to 100 as it should, I am trying to avoid this by having the pager uses a predefined number of page to render, IE if the variable holding the number of pages is 5 and I have 100 pages I need the pager to render 1 2 3 4 5 .... Next
I must be having a brain fart today since I have not been able to create the proper formula to render the pager properly when it comes to the "..."
The working pager is listed below, I removed my attempt to have the ... display properly to make the code easy to read.

Thanks

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             public static string Pager<TController>(this HtmlHelper helper,
            int currentPage,
            int totalRecords,
            int currentPageSize,
            int numberOfPages,
            Expression<Action<TController>> expr)
            where TController:Controller
        {
            string titletext = "go to page ";
            string action = string.Empty;
            string param = string.Empty;
            string controller = string.Empty;
            RouteValueDictionary routeValuesFromExpression = ExpressionHelper.GetRouteValuesFromExpression<TController>(expr);
           
                controller= routeValuesFromExpression["Controller"].ToString();
                action  = routeValuesFromExpression["Action"].ToString();
                int result = totalRecords % currentPageSize;
                var totalPages = 0;
            if(result==0)
                totalPages =totalRecords/currentPageSize;
            else
                totalPages= (totalRecords / currentPageSize) + 1;
                if (totalPages < currentPage)
                    return string.Empty;
                StringBuilder links = new StringBuilder();           
            if (currentPage > 1)
                links.Append(System.Web.Mvc.Html.LinkExtensions.ActionLink(helper, "Previous", action, controller, new { page = (currentPage-1) }, new { title = String.Format("Previous page is {0}", currentPage-1) }));
 
            if ((currentPage - currentPageSize) > 1) //Previous ... issue
 
                links.Append(System.Web.Mvc.Html.LinkExtensions.ActionLink(helper, "...", action, controller, new { page = ((currentPage - currentPageSize))  }, new { title = titletext + ((currentPage - currentPageSize)).ToString() }));
 
            for (int i = 1; i < totalPages+1;i++ ) //now the pager render all rows
            {
                if (i == currentPage)
 
                    links.Append(String.Format("<span class='current' title='{1}'>{0}</span>", (i).ToString(), "you are on page " + (i).ToString()));
 
                else
                    links.Append(System.Web.Mvc.Html.LinkExtensions.ActionLink(helper, (i).ToString(), action, controller, new { page = i}, new { title = titletext + (i).ToString() }));
 
            }
 
            if ((currentPage + currentPageSize) <= (totalPages - 1))//this is where I am having the issue
 
                links.Append(System.Web.Mvc.Html.LinkExtensions.ActionLink(helper, "....", action, controller, new { page = currentPage + currentPageSize  }, new { title = titletext + (currentPage + currentPageSize ).ToString() }));
 
            if (currentPage < totalPages  )
                links.Append(System.Web.Mvc.Html.LinkExtensions.ActionLink(helper, "Next ", action, controller, new { page = currentPage +1 }, new { title = String.Format("next page is {0}", currentPage +1) }));
            return links.ToString();
        }

           
         

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Pager calculation

Asked by sammy1971 in C# Programming Language, Microsoft Visual C#.Net, Programming for ASP.NET

Tags: C#, Asp.Net

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