Convert DataTable into Json C# Newtonsoft json.net c#

DataTable to Json:

Sometimes developer may in need of Converting DataTable into Json format. There are many ways to convert DataTable into JSON format. The most common way is looping using StringBuilder but for bulk iteration this method is not recommended, still developer needs to iterate over limited data they can try below code:

StringBuilder:

using System.Text;
public string ConvertDatamyDataTableToJson(DatamyDataTable myDataTable)   
{  
    var JsonStringBuilder = new StringBuilder();  
    if (myDataTable.Rows.Count > 0)   
    {  
        JsonStringBuilder.Append("[");  
        for (int i = 0; i < myDataTable.Rows.Count; i++)   
        {  
            JsonStringBuilder.Append("{");  
            for (int j = 0; j < myDataTable.Columns.Count; j++)   
            {  
                if (j < myDataTable.Columns.Count - 1)   
                {  
                    JsonStringBuilder.Append("\"" + myDataTable.Columns[j].ColumnName.ToString() + "\":" + "\"" + myDataTable.Rows[i][j].ToString() + "\",");  
                }   
                else if (j == myDataTable.Columns.Count - 1)   
                {  
                    JsonStringBuilder.Append("\"" + myDataTable.Columns[j].ColumnName.ToString() + "\":" + "\"" + myDataTable.Rows[i][j].ToString() + "\"");  
                }  
            }  
            if (i == myDataTable.Rows.Count - 1)   
            {  
                JsonStringBuilder.Append("}");  
            }   
            else   
            {  
                JsonStringBuilder.Append("},");  
            }  
        }  
        JsonStringBuilder.Append("]");  
    }  
    return JsonStringBuilder.ToString();  
}

Note: We are using StringBuilder class hence, developer must include System.Text library as using.

This is straight forward looping which takes DataTable as input parameter and iterate over each row/column to build JSON format.

JavaScript Serializer:

Another method is using JavaScriptSerializer class which offers rich properties and methods to establish a asynchronous internal communication layer to serialize or deserialize data.

This library is a part of System.Web.Script.Serialization object model. which must be reference in your code as below:

using System.Web.Script.Serialization;
public string DatamyDataTableToJsonUsingJavaScriptSerializer(DatamyDataTable myDataTable) 
{  
    JavaScriptSerializer jsSerializer = new JavaScriptSerializer();  
    List > parentRow = new List <Dictionary<string,object>>();  
    Dictionary <string,object> childRow;  
    foreach(DataRow row in myDataTable.Rows) 
    {  
        childRow = new Dictionary <string,object>();  
        foreach(DataColumn col in myDataTable.Columns) 
        {  
            childRow.Add(col.ColumnName, row[col]);  
        }  
        parentRow.Add(childRow);  
    }  
    return jsSerializer.Serialize(parentRow);  
}

Newtonsoft JSON.Net:

Json.Net (Newtonsoft) also offers a method to Serialize object into Json. Lets have a look at below code using Newtonsoft.Json library which offers JSONConvert.SerializeObject method:

using Newtonsoft.JSON;  
public string DataTableToJSONWithJSONNet(DataTable myDataTable) {  
   string JsonString=string.Empty;  
   JsonString = JSONConvert.SerializeObject(myDataTable);  
   return JsonString;
}

Next>>Populating DataTable with DataSet SQL Server C#

Share on Facebook

VBA Basic and Advanced Questions and Answers

Basic Q&A Q. VBA stands for? Ans: Visual Basic for Applications Q. What is VBA? Ans: VBA (Visual Basic for Applications) is a scripting language. It can be used to automate most of the Microsoft Office Applications like Excel, Word, PowerPoint, MS Access, Outlook etc. Q. Types of available modules in VBA VBA contains four […]

Export Generic Collection to PDF ASP.Net Core MVC

PDF Sometime you may in need to export data in PDF. Following code will use Syncfusion Package and give you ready made Table pushed from Generic collection. Put below code in Repository Put below code in Controller JavaScript Code Finally you can attach id to an element in html and in JavaScript on Document ready […]

Export Excel ASP.Net Core MVC

Excel Export Following Example helps you to export excel from database in a generic way using EPPlus library. Requirement EPPlus Nuget Package Code to Repository Supporting Method Code to Controller Code to JavaScript JavaScript Supporting Method You can hit ExportToExcel() call in document ready method in JavaScript document by pointing any id written in HTML […]

Save/Retrieve Session ASP.Net Core MVC

Session Plays a vital role while dealing with caching in your browser. ASP.Net Core offers Session caching fast and reliable way. Here is the practical example. Put following code anywhere in common class or Repository, it has two methods Generic in nature Add/Get. Add Method will allow you to cache object in Browser memory and […]

Number List in Word Document using C# code example

Number List Microsoft Word offers feature by which you can auto number your list in various formats. In this article we will write code to dynamically generate a numbered list in a document using C#. C# Code example Note: You have to add Microsoft Word Interop library as reference to enable Using statement or create […]

Sorting in Microsoft Word using VBA (Visual Basic for Applications)

Sorting Do you know, Microsoft Word has capability to perform sorting over a document. In this article we will write code to sort paragraphs in Alphabetical order using visual basic for applications code. Before code Code example Put above code in a module, Select number of paragraphs that you would like to sort in A-Z […]

EPPlus Open Office Xml Office solution using C#

EPPlus Is an open Office XML solution, highly useful library capable to manipulate Microsoft Excel similar to Introp APIs. Why EPPlus? As per Microsoft the solutions (Excel, Word, PowerPoint, Outlook etc) built for client architecture but what about Servers? Let’s take an example that I have recently faced and EPPlus helped me a lot here. […]

String vs StringBuilder C#.Net with code example

String C# class which offers capability to store any type of string data into a variable. Strings are immutable (non-modifiable) cause performance overhead because each time we modify a string it creates a copy of modified instance into the memory, hence, as a practice string should be avoided for large string operations. Following is the […]

Var vs. Dynamic C# with code example

Var vs. Dynamic C# offers variety with flavors to accomplish the task to the developers. var keyword defines a static nature which gets resolve at compile-time introduced in C# 3.0 where dynamic gets resolved at runtime introduced in C# 4.0. Var is a statically type variable, which means values of these variables gets decoded at […]

Multi-threading in C#.Net with step by step code example

Multi-threading Is a concept to execute multiple tasks or process simultaneously. Basically multi-threading enables paths to your application to execute multiple processes. Multi-threading can be achieved in C# using System.Threading name space which provides complete control over threading. Let’s write example code where we will execute two different methods to print numbers using loop and […]

Convert DataTable into Json C#

DataTable to Json:

Leave a Reply Cancel reply

Number List in Word Document using C# code example

Comments vs Note Text Excel Add-in with code example

Microsoft Word End Notes with code example (VBA,VSTO)

Microsoft Word Escape Key method VBA, C#, VB.Net example

Microsoft Word PageBreaks and SectionBreaks VBA, C#, VB.Net Example

RSS feed

Subscribe to our articles