How to Display an Image in Devexpress XtraGrid Control using C# and VB.NET

To Display an Image in Devexpress XtraGrid Control using C# and VB.NET see the example below.

Sample C#

#region

using System.Data;
using System.Drawing;
using System.Windows.Forms;
using WindowsFormsApplication77.Properties;
using DevExpress.XtraEditors.Repository;

#endregion

namespace de.fesslersoft.XtraGridImageTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            gridControl1.DataSource = CreateTable(3);
            gridView1.Columns["Image"].ColumnEdit = new RepositoryItemPictureEdit();
        }

        private DataTable CreateTable(int rowCount)
        {
            var image = Resources.Image1;
            var tbl = new DataTable();
            tbl.Columns.Add("ID", typeof (int));
            tbl.Columns.Add("URL", typeof (string));
            tbl.Columns.Add("Image", typeof (Image));
            for (var i = 0; i < rowCount; i++)
            {
                tbl.Rows.Add(new object[] {i, "http://codesnippets.fesslersoft.de", image});
            }
            return tbl;
        }
    }
}

Sample VB.NET

#Region ""

Imports System.Data
Imports System.Drawing
Imports System.Windows.Forms
Imports WindowsFormsApplication77.Properties
Imports DevExpress.XtraEditors.Repository

#End Region

Namespace de.fesslersoft.XtraGridImageTest
	Public Partial Class Form1
		Inherits Form
		Public Sub New()
			InitializeComponent()
			gridControl1.DataSource = CreateTable(3)
			gridView1.Columns("Image").ColumnEdit = New RepositoryItemPictureEdit()
		End Sub

		Private Function CreateTable(rowCount As Integer) As DataTable
			Dim image = Resources.Image1
			Dim tbl = New DataTable()
			tbl.Columns.Add("ID", GetType(Integer))
			tbl.Columns.Add("URL", GetType(String))
			tbl.Columns.Add("Image", GetType(Image))
			For i As var = 0 To rowCount - 1
				tbl.Rows.Add(New Object() {i, "http://codesnippets.fesslersoft.de", image})
			Next
			Return tbl
		End Function
	End Class
End Namespace

Result

XtraGrid ColumnImages

XtraGrid ColumnImages


How to remove columns from DataTable in C# and VB.NET

To remove columns from DataTable in C# and VB.NET you can use the snippet below.

Sample C#

DataTable dataTable;
dataTable.Columns.Remove("Columnname");
dataTable.Columns.RemoveAt(index);

Sample VB.NET

Dim dataTable As DataTable
dataTable.Columns.Remove("Columnname")
dataTable.Columns.RemoveAt(index)

How to query a DataTable using LINQ in C# and VB.NET

To query a DataTable using LINQ in C# and VB.NET you can use the snippet below.
In order to use the snippet, you need to reference System.Data.DataSetExtensions.

Sample C#

var resultData = (from myDataRow in myDataTable.AsEnumerable() where myDataRow.Field<Int32>("Fieldname") == 1 select myRow);

Sample VB.NET

Dim resultData = (From myDataRow In myDataTable.AsEnumerable() Where myDataRow.Field(Of Int32)("Fieldname") = 1myRow)

How to get all column names of a Table in Oracle

To get all column names of a Table in Oracle you can use the following snippet.

SELECT table_name, column_name, data_type, data_length
FROM USER_TAB_COLUMNS
WHERE table_name = 'TABLENAME'

If you are using MSSQL, take a look at this snippet -> How to list all columns from a table in MSSQL

How to get a list of all tables in Oracle

To get a list of all tables in Oracle you can use the following query.

SELECT owner, table_name FROM dba_tables

if your user does not have sufficient access rights to query dba_tables, you can try to query all_tables which will only show you the tables you are allowed to see.

SELECT owner, table_name FROM all_tables

How to check if a column exists in MSSQL

To check if a column exists in MSSQL you can use the following snippet.

Sample MSSQL

SELECT name FROM sys.columns WHERE object_id = OBJECT_ID('Pricetable') AND name='Price'