How to generate Multiple unique Random Number in Asp.net C#

Question

Hello,

 Actually i want to generate more than 1 random  from given reng od minumum and maximum value from textbox on button click

 

 

. aspx..-------------

<div>

Minimum value<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />

Maximum value<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br />

<br />

Result : <asp:Label ID="lblnumber" runat="server"></asp:Label>

<asp:Button ID="Button1" runat="server"

OnClick="Button1_Click" Text="Generate Random Number in a Rage" /><br />

</div>

 

 

 

.cs-----------

protected void Button1_Click(object sender, EventArgs e)

{

//------1

Random r1 = new Random();

int num = r1.Next(

Convert.ToInt32(TextBox1.Text),

Convert.ToInt32(TextBox2.Text)

);

////----- 2

//Random r2 = new Random();

//int num2 = r2.Next(

// Convert.ToInt32(TextBox1.Text),

// Convert.ToInt32(TextBox2.Text)

// );

////----- 2

//Random r3 = new Random();

//int num3 = r3.Next(

// Convert.ToInt32(TextBox1.Text),

// Convert.ToInt32(TextBox2.Text)

// );

////----- 2

//Random r4 = new Random();

//int num4 = r4.Next(

// Convert.ToInt32(TextBox1.Text),

// Convert.ToInt32(TextBox2.Text)

// );

lblnumber.Text = "First No." + num.ToString(); // +", 2nd No." + num2.ToString() + ", No.3 " + num3.ToString() + ", 4th No." + num4.ToString();

//Response.Write(num.ToString());

NewNumber();

}

public Random a = new Random(); // replace from new Random(DateTime.Now.Ticks.GetHashCode());

// Since similar code is done in default constructor internally

public List<int> randomList = new List<int>();

int MyNumber = 0;

private void NewNumber()

{

MyNumber = a.Next(0, 10);

if (!randomList.Contains(MyNumber))

randomList.Add(MyNumber);

}

 

 

With is code , i get only one random number on every click, But i want minimum 4 random number .

Please chack and resolve this problem.