Combine Foreach Loop And Counter To Add Dynamically Generated Html To The Beginning And End Of Every Nth Row

I am dynamically generating HtmlGeneric Controls with data in a DataTable. I need to concatenate HTML to the beginning and end of each group of 3. For example, my table looks somet

Solution 1:

Shane, what you are essentially doing is Paging through your Rows in your table, so focus on Skip and Take Linq extension methods. Below is a hasty sample

voidMain()
{
    // Data table that we are trying to page trough 
    List<string> rows = new List<string>() 
    {
        " title1,body1 ",
        " title2,body2 ",
        " title3,body3 ",
        " title4,body4 ",
        " title5,body5 ",
        " title6,body6 ",
        " title7,body7 "
    };
    
    //Result after paging 
    List<string> group = new List<string>();
    
    // Set your page size or pass in as a parameterint numberOfObjectsPerPage = 3;
    
    decimal totalRows = rows.Count; 
    int pages = (int) Math.Ceiling(totalRows/numberOfObjectsPerPage);
    
        
    for(int i=0;i<pages;i++)
    {       
            
            string rowText = "";
            
            // Get the rows in that page Focus on the Skip and Take methodsvar tempRows = rows.Skip(i * numberOfObjectsPerPage).Take(numberOfObjectsPerPage);
            
            // Now foreach page do something hereforeach(var row in tempRows)
            {
                rowText = rowText + row.ToString();
            }
            
            group.Add("div group" + rowText + "/div" );
            
    };

    group.ForEach( g => 
    {
         Console.WriteLine(g);
    });
}

you get something like this.

div group title1,body1  title2,body2  title3,body3 /divdiv group title4,body4  title5,body5  title6,body6 /divdiv group title7,body7 /div

Solution 2:

I think it's a good way to use two methods, one for creating start tag and one for end tag if needed, like this:

int counter=0, quantity;//make these global in your classpublicvoidCreateHtml()
    {
        DataTable dtCards = GetData();
        quantity= dt.Rows.Count;
        foreach (DataRow row in dtCards.Rows)
        {   counter++;
            EndCardGroup();
            StartCardGroup();
            var titleText = row["Title"].ToString();
            var bodyText = row["Body"].ToString();
            CreateDiv(titleText, bodyText); //method to create HmtlGeneric Controls
        }
    }

    privatevoidStartCardGroup()
    {
        if (counter % 3 == 0 || counter == 1)
        {
            //you code to create start 'CardGroup' div
        }
    }

    privatevoidEndCardGroup()
    {
        if (counter %3 == 0 || counter==quantity)
        {
            //you code to create end 'CardGroup' div
        }
    }

Of course you can use for statment instead of foreach. and you can make DataTable global to use its Row.Count to get rid of counter and quantity.