Can I convert EventArgs type to PaintEventArgs type ?

Question

I want to convert EventArgs type to PaintEventArgs type, cast button_click to form_paint, how do I write code ? You see my error code http://www.mediafire.com/file/zw4s4h8mst92l9k/RandomNumber.rar/file

Dong Lam Trien · Answer

Thank you so much

Dong Lam Trien · Answer

You have not viewed my code namespace DrawText_Random { public partial class Form2 : Form { public Form2() { InitializeComponent(); //progressBar1.Visible = false; progressBar1.Minimum = 0; progressBar1.Maximum = 100; this .Paint += new System.Windows.Forms.PaintEventHandler( this .Form9_Paint); } int valueforShadowedTextPaint = 0; private void btnDrawText_Click( object sender, EventArgs e) //PaintEventArgs e { progressBar1.Value = 0; this .timer1.Interval = 100; this .timer1.Enabled = true ; } private void ShadowedTextPaint(PaintEventArgs e, int num) { // Set up the font Font fnt = new Font( "Calibri" , 296, FontStyle.Bold | FontStyle.Italic, GraphicsUnit.Point); // Get the Form's Graphics object Graphics g = e.Graphics; // Draw background text g.DrawString(num.ToString(), fnt, Brushes.DarkGray, 244, 104); // Draw main text slightly offset from shadow text g.DrawString(num.ToString(), fnt, Brushes.Aqua, 240, 100); } private void timer1_Tick( object sender, EventArgs e) { if (progressBar1.Value { PaintEventArgs g = (PaintEventArgs)e; //Error here: Unable to cast object of type 'System.Windows.Forms.MouseEventArgs' to type 'System.Windows.Forms.PaintEventArgs'. Random rd = new Random(); Random rd = new Random(); int Number = rd.Next(0, 999); //This place must call ShadowedTextPaint (...) function to jump continuously ShadowedTextPaint(e, Number); progressBar1.Value++; } else { this .Invalidate(); this .timer1.Enabled = false ; } } } }

Rajanikant Hawaldar · Answer

Hi Dong Lam Trien, Form1_Paint(sender, null ); or you call Paint method by above code or using invalidate() function. this .Invalidate(); https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.control.invalidate?redirectedfrom=MSDN&view=netframework-4.8#overloads

Can I convert EventArgs type to PaintEventArgs type ?

Answers (3)