C＃解析数据行

Question

Scenario:

Based on user interaction, one of several stored procedures will be called, each having different result structure, so I can't strongly type the return.

I am using Petapoco and returning IEnumerable<dynamic> rows, converting to a datatable (which takes about 245ms) then looping through the rows in the datatable's rows and appending to a string creating an html table.

One result is returning over 3000 lines and is taking almost 2 minutes to parse.

How can I improve this? Each row is only taking around 35ms so individually not a problem.

I'd rather not have to add pagination if I can get away with it.

Answer 1

Most likely using a StringBuilder is the solution.

Instead of appending to a string instance:

var html = "";

foreach(var row in rows)
    html += "<p>" + row + "</p>";

Use a StringBuilder :

var sb = new StringBuilder();
foreach(var row in rows)
    sb.Append("<p>" + row + "</p>");

var html = sb.ToString();