AddItems

int HiddenValue;

protected void Button1_Click(object sender, EventArgs e)
{
HiddenValue = Convert.ToInt32(HiddenField1.Value.ToString());
ListBox1.Items.Add("Item " + HiddenValue.ToString());
Label4.Text = HiddenValue.ToString();
HiddenValue = HiddenValue + 1;
HiddenField1.Value = HiddenValue.ToString();
}
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
TextBox1.Text = ListBox1.SelectedItem.Text.ToString();
}

TextBox Control

protected void Button1_Click(object sender, EventArgs e)
{
TextBox1.Text = "You have clicked the button";
TextBox4.Text = "This is a multi line textbox. This is a multi line textbox. This is a multi line textbox. This is a multi line textbox. ";

TextBox3.Text = TextBox2.Text;
}
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
TextBox1.Text = "The Text is changed.";

}

Literal Control

protected void Button1_Click(object sender, EventArgs e)
{
Literal1.Text = "Welcome to ASP.NET 2.0";
}

Label Control

Source Code is:

protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Label Text changed";
Label1.BorderStyle = BorderStyle.Dotted;
Label1.BackColor = System.Drawing.Color.Aqua;
}
protected void Button2_Click(object sender, EventArgs e)
{
Label1.Visible =!(Label1.Visible);
}

HiddenField Control

Html Code is:

asp:HiddenField ID="HiddenField1" runat="Server" Value="Welcome to ASP.NET 2.0"
Visible="False"

Source Code is:


protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = HiddenField1.Value;
}

File Upload Control

Source Code:

protected void Button1_Click(object sender, EventArgs e)
{
if( FileUpload1.HasFile)
{

FileUpload1.SaveAs("C:/projects/" + FileUpload1.FileName);
Label2.Text = "File Uploaded";
}
else
Label2.Text = "No uploaded file";

}