WF-64705 - Updated the README file

README.md

@@ -1,2 +1,32 @@
-# How to create custom column in winforms datagrid?
-This repositories contains the samples to create custom column in winforms datagrid
+# How to customize the column format in WinForms DataGrid (SfDataGrid)
+
+[SfDataGrid](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.SfDataGrid.html?_ga=2.113253391.967019853.1668146580-766490130.1650530957&_gl=1*4g8syb*_ga*NzY2NDkwMTMwLjE2NTA1MzA5NTc.*_ga_WC4JKKPHH0*MTY2ODE1ODI2OC4yOTcuMS4xNjY4MTY1NDc3LjAuMC4w) allows you to create and assign custom format for the columns through the [IDataGridFormatProvider](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.IDataGridFormatProvider.html?_ga=2.154793776.967019853.1668146580-766490130.1650530957&_gl=1*kfpypb*_ga*NzY2NDkwMTMwLjE2NTA1MzA5NTc.*_ga_WC4JKKPHH0*MTY2ODE1ODI2OC4yOTcuMS4xNjY4MTY1NDc3LjAuMC4w) interface. The [GridColumnBase.FormatProvider](https://help.syncfusion.com/cr/windowsforms/Syncfusion.WinForms.DataGrid.GridColumnBase.html?_ga=2.154793776.967019853.1668146580-766490130.1650530957&_gl=1*kfpypb*_ga*NzY2NDkwMTMwLjE2NTA1MzA5NTc.*_ga_WC4JKKPHH0*MTY2ODE1ODI2OC4yOTcuMS4xNjY4MTY1NDc3LjAuMC4w#Syncfusion_WinForms_DataGrid_GridColumnBase_FormatProvider) property can be used to set custom format for the columns.
+
+```
+sfDataGrid1.Columns["Value"].Format = "00,00%";
+sfDataGrid1.Columns["Value"].FormatProvider = new CustomFormatter();public class CustomFormatter : IDataGridFormatProvider
+{
+    public object Format(string format, GridColumnBase gridColumn, object record, object value)
+    {
+        if (value == null)
+        {
+            throw new ArgumentNullException((value == null) ? "format" : "args");
+        }
+
+        if (gridColumn is GridColumn && (gridColumn as GridColumn).MappingName == "Value")
+        {
+            var orderInfo = record as OrderInfo;
+                return (Convert.ToDecimal((orderInfo.Value.ToString()))).ToString("0.00%");
+        }
+        return value.ToString();
+    }
+    public object GetFormat(Type formatType)
+    {
+        return this;
+    }
+    public string Format(string format, object arg, IFormatProvider formatProvider)
+    {
+        throw new NotImplementedException();
+    }
+}
+```