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How to create the single group for null and empty value in Windows Forms DataGrid(SfDataGrid)?
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‎README.md‎

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# how-to-create-the-single-group-for-null-and-empty-value-in-windows-forms-datagrid-sfdatagrid-
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How to create the single group for null and empty value in Windows Forms DataGrid(SfDataGrid)
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# How to create the single group for null and empty value in Windows Forms DataGrid(SfDataGrid)?
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## About the sample
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This example illustrates how to create the single group for null and empty value in Windows Forms DataGrid(SfDataGrid)
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By default, empty and null values are created the separate groups in SfDataGrid. You can able to create the single group for empty and null value by using KeySelector in GroupColumnDescriptions.
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```C#
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this.sfDataGrid.GroupColumnDescriptions.Add(new GroupColumnDescription()
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{
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ColumnName = "Country",
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KeySelector = (string ColumnName, object o) =>
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{
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var item = (o as OrderInfo).Country;
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if (item == null || item == "")
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{
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return "";
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}
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return item;
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}
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});
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```
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## Requirements to run the demo
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Visual Studio 2015 and above versions

‎SfDataGridDemo/AddNewRow_2015.csproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{3839D384-FF5F-4FB9-B1D1-7918E512B434}</ProjectGuid>
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<OutputType>WinExe</OutputType>
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<AppDesignerFolder>Properties</AppDesignerFolder>
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<RootNamespace>AddNewRow</RootNamespace>
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<AssemblyName>AddNewRow</AssemblyName>
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<TargetFrameworkVersion>v4.6</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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<TargetFrameworkProfile />
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="DemoCommon" />
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<Reference Include="Syncfusion.Core.WinForms" />
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<Reference Include="Syncfusion.Data.WinForms" />
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<Reference Include="Syncfusion.GridCommon.WinForms" />
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<Reference Include="Syncfusion.SfDataGrid.WinForms" />
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<Reference Include="Syncfusion.SfInput.WinForms" />
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<Reference Include="Syncfusion.SfListView.WinForms" />
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<Reference Include="Syncfusion.Shared.Base" />
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<Reference Include="Syncfusion.DataSource.WinForms" />
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<Reference Include="System" />
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<Reference Include="System.ComponentModel.DataAnnotations" />
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<Reference Include="System.Core" />
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<Reference Include="System.Data.Linq" />
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<Reference Include="System.Xml.Linq" />
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<Reference Include="System.Data.DataSetExtensions" />
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<Reference Include="Microsoft.CSharp" />
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<Reference Include="System.Data" />
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<Reference Include="System.Deployment" />
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<Reference Include="System.Drawing" />
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<Reference Include="System.Windows.Forms" />
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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="Form1.cs">
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<SubType>Form</SubType>
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</Compile>
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<Compile Include="Form1.Designer.cs">
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<DependentUpon>Form1.cs</DependentUpon>
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</Compile>
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<Compile Include="Program.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<EmbeddedResource Include="Form1.resx">
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<DependentUpon>Form1.cs</DependentUpon>
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</EmbeddedResource>
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<EmbeddedResource Include="Properties\Resources.resx">
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<Generator>ResXFileCodeGenerator</Generator>
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<LastGenOutput>Resources.Designer.cs</LastGenOutput>
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<SubType>Designer</SubType>
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</EmbeddedResource>
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<Compile Include="Properties\Resources.Designer.cs">
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<AutoGen>True</AutoGen>
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<DependentUpon>Resources.resx</DependentUpon>
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<DesignTime>True</DesignTime>
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</Compile>
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<None Include="Properties\Settings.settings">
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<Generator>SettingsSingleFileGenerator</Generator>
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<LastGenOutput>Settings.Designer.cs</LastGenOutput>
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</None>
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<Compile Include="Properties\Settings.Designer.cs">
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<AutoGen>True</AutoGen>
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<DependentUpon>Settings.settings</DependentUpon>
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<DesignTimeSharedInput>True</DesignTimeSharedInput>
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</Compile>
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</ItemGroup>
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<ItemGroup>
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<Service Include="{3259AA49-8AA1-44D3-9025-A0B520596A8C}" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<ItemGroup>
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<Reference Include="Syncfusion.Licensing" />
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</ItemGroup>
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
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Other similar extension points exist, see Microsoft.Common.targets.
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<Target Name="BeforeBuild">
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</Target>
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<Target Name="AfterBuild">
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</Target>
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-->
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</Project>

‎SfDataGridDemo/AddNewRow_2015.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 14
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AddNewRow_2015", "AddNewRow_2015.csproj", "{3839D384-FF5F-4FB9-B1D1-7918E512B434}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{3839D384-FF5F-4FB9-B1D1-7918E512B434}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{3839D384-FF5F-4FB9-B1D1-7918E512B434}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{3839D384-FF5F-4FB9-B1D1-7918E512B434}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{3839D384-FF5F-4FB9-B1D1-7918E512B434}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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EndGlobal

‎SfDataGridDemo/Form1.Designer.cs‎

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‎SfDataGridDemo/Form1.cs‎

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using DemoCommon.Grid;
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using Syncfusion.Data;
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using Syncfusion.WinForms.DataGrid;
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using Syncfusion.WinForms.DataGrid.Enums;
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using System;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using System.Windows.Forms;
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namespace AddNewRow
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{
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/// <summary>
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/// Summary description for Form1.
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/// </summary>
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public partial class Form1 : Form
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{
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#region Constructor
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OrderInfoCollection orderInfoCollection = new OrderInfoCollection();
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public Form1()
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{
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InitializeComponent();
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sfDataGrid.DataSource = orderInfoCollection.Orders;
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sfDataGrid.ShowGroupDropArea = true;
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this.sfDataGrid.GroupColumnDescriptions.Add(new GroupColumnDescription()
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{
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ColumnName = "Country",
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KeySelector = (string ColumnName, object o) =>
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{
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var item = (o as OrderInfo).Country;
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if (item == null || item == "")
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{
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return "";
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}
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return item; ;
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}
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});
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}
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}
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#endregion
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}
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public class OrderInfo : INotifyPropertyChanged
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{
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int orderID;
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string customerId;
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string country;
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string customerName;
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string shippingCity;
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public event PropertyChangedEventHandler PropertyChanged;
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public int OrderID
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{
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get { return orderID; }
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set
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{
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orderID = value;
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RaisePropertyChanged("OrderID");
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}
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}
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public string CustomerID
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{
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get { return customerId; }
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set
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{
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customerId = value;
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RaisePropertyChanged("CustomerID");
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}
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}
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public string CustomerName
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{
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get { return customerName; }
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set
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{
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customerName = value;
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RaisePropertyChanged("CustomerName");
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}
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}
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public string Country
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{
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get { return country; }
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set
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{
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country = value;
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RaisePropertyChanged("Country");
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}
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}
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public string ShipCity
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{
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get { return shippingCity; }
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set
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{
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shippingCity = value;
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RaisePropertyChanged("ShipCity");
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}
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}
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public OrderInfo(int orderId, string customerName, string country, string customerId, string shipCity)
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{
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this.OrderID = orderId;
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this.CustomerName = customerName;
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this.Country = country;
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this.CustomerID = customerId;
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this.ShipCity = shipCity;
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}
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/// <summary>
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/// Occurs when any property value changed.
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/// </summary>
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/// <param name="propertyName">The name of the property which was changed.</param>
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private void RaisePropertyChanged(string propertyName)
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{
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if (PropertyChanged != null)
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this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
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}
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}
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public class OrderInfoCollection
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{
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public ObservableCollection<OrderInfo> _orders;
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public ObservableCollection<OrderInfo> Orders
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{
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get { return _orders; }
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set { _orders = value; }
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}
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public OrderInfoCollection()
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{
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_orders = new ObservableCollection<OrderInfo>();
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this.GenerateOrders();
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}
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private void GenerateOrders()
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{
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_orders.Add(new OrderInfo(1001, "Maria Anders", null, "ALFKI", "Berlin"));
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_orders.Add(new OrderInfo(1002, "Ana Trujilo", null, "ANATR", "Mexico D.F."));
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_orders.Add(new OrderInfo(1003, "Antonio Moreno", null, "ANTON", "Mexico D.F."));
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_orders.Add(new OrderInfo(1004, "Thomas Hardy", "UK", "AROUT", "London"));
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_orders.Add(new OrderInfo(1005, "Christina Berglund", string.Empty, "BERGS", "Lula"));
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_orders.Add(new OrderInfo(1006, "Hanna Moos", "Germany", "BLAUS", "Mannheim"));
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_orders.Add(new OrderInfo(1007, "Frederique Citeaux", string.Empty, "BLONP", "Strasbourg"));
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_orders.Add(new OrderInfo(1008, "Martin Sommer", "Spain", "BOLID", "Madrid"));
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_orders.Add(new OrderInfo(1009, "Laurence Lebihan", "France", "BONAP", "Marseille"));
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_orders.Add(new OrderInfo(1010, "Elizabeth Lincoln", "Canada", "BOTTM", "Tsawassen"));
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_orders.Add(new OrderInfo(1011, "Maria Anders", null, "ALFKI", "Berlin"));
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_orders.Add(new OrderInfo(1012, "Ana Trujilo", "Mexico", "ANATR", "Mexico D.F."));
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_orders.Add(new OrderInfo(1013, "Antonio Moreno", "Mexico", "ANTON", "Mexico D.F."));
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_orders.Add(new OrderInfo(1014, "Thomas Hardy", string.Empty, "AROUT", "London"));
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_orders.Add(new OrderInfo(1015, "Christina Berglund", "Sweden", "BERGS", "Lula"));
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_orders.Add(new OrderInfo(1016, "Hanna Moos", string.Empty, "BLAUS", "Mannheim"));
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_orders.Add(new OrderInfo(1017, "Frederique Citeaux", "France", "BLONP", "Strasbourg"));
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_orders.Add(new OrderInfo(1018, "Martin Sommer", string.Empty, "BOLID", "Madrid"));
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_orders.Add(new OrderInfo(1019, "Laurence Lebihan", "France", "BONAP", "Marseille"));
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_orders.Add(new OrderInfo(1020, "Elizabeth Lincoln", null, "BOTTM", "Tsawassen"));
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}
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}

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