First of all, we have to fetch the records from the database (MS Sqlserver) into the C# DataTable, or we can add dynamic rows to our DataTable. So our code looks like as written below.
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方法一：Fetch each data (value), and append to our jsonString StringBuilder. This is how our code looks like
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方法 2: Convert DataTable to JSON using JavaScriptSerializer:
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方法3（推荐）: Convert DataTable to JSON using Json.Net DLL (Newtonsoft):
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