To select a item on rightclick using devexpress ListboxControl you need to use the MouseDown Event.
See the samples below.
private void listBoxControl1_MouseDown(object sender, MouseEventArgs e)
{
listBoxControl1.SelectedIndex = listBoxControl1.IndexFromPoint(new Point(e.X, e.Y));
}
Private Sub listBoxControl1_MouseDown(sender As Object, e As MouseEventArgs) listBoxControl1.SelectedIndex = listBoxControl1.IndexFromPoint(New Point(e.X, e.Y)) End Sub
To Display an Image in Devexpress XtraGrid Control using C# and VB.NET see the example below.
#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;
}
}
}
#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
XtraGrid ColumnImages
To Check if a Form is open in C# and VB.NET you can use the snippet below.
public static bool FormIsOpen(FormCollection application, Type formType)
{
//usage sample: FormIsOpen(Application.OpenForms,typeof(Form2)
return Application.OpenForms.Cast<Form>().Any(openForm => openForm.GetType() == formType);
}
Public Shared Function FormIsOpen(application__1 As FormCollection, formType As Type) As Boolean 'usage sample: FormIsOpen(Application.OpenForms,GetType(Form2) Return Application.OpenForms.Cast(Of Form)().Any(Function(openForm) openForm.[GetType]() = formType) End Function
To check if a form is already open in C# and VB.NET you can use the following snippet.
public static bool IsFormOpen(Type FormType)
{
foreach (var OpenForm in Application.OpenForms)
{
if (OpenForm.GetType() == FormType)
{
return true;
}
}
return false;
}
Public Shared Function IsFormOpen(FormType As Type) As Boolean For Each OpenForm As var In Application.OpenForms If OpenForm.GetType() = FormType Then Return True End If Next Return False End Function
To clear all Textboxes on a Form in C# or VB.NET you can use the Extensions method in the snippet below.
public static void ClearTextboxes(this Form form)
{
foreach (var item in form.Controls.OfType<TextBox>())
{
item.Text = string.Empty;
}
}
<System.Runtime.CompilerServices.Extension> _ Public Sub ClearTextboxes(form As Form) For Each item As TextBox In form.Controls.OfType(Of TextBox)() item.Text = String.Empty Next End Sub