How to get column value of grid in C# Windows application?
When I clicked on the cell, at that time it should get column values.
private void gridAgentD
Since you comment saying you're using DataGrid, this is a WPF application, not a Form application.
WPF DataGrid Control is visual representation of data, you cannot read a specific cell directly out of a DataGrid, Hence you cannot select a specific row or column on a DataGrid, unless you bind it to a data source.
DataGrid is designed to use with DataTable. See this link to see how DataGrid is binded to DataTable.
Then, to read a specific cell value in DataGrid, you would read the DataTable instead (e.g. dataTable1[RowNumber][ColumnName]
where RowNumber is an int, and ColumnName is a string.