C# code for Percentage in Goal Seek

Question

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I need to develop an application
where Goal seek function need to be implemented for percentage calculation.

Like

A1     b1   c1   d1
2000   4    80  2080

when I change the d1 cell value
A1 cell value should get changed in excel using goal seek.

Same concept need to be implemented in C#

textbox1  textbox2  textbox3   textBox4   
 2000      4         80          2080

If I change textbox4 then textbox1 and textbox3 would get change

Is it possible?

If yes then please help

Posted 12-Jan-13 4:11am

Sourav Sarkar-SS2

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3 solutions

Solution 2

Can be done easily with TextChanged event and autopostback in text box

XML

<form runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
  <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
  <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
  <asp:TextBox ID="TextBox4" runat="server" ontextchanged="TextBox4_TextChanged"
      style="height: 22px" AutoPostBack=true></asp:TextBox>
  </form>

and the cs coding

C#

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        TextBox3.Text = "0";


    }



    protected void TextBox4_TextChanged(object sender, EventArgs e)
    {
     TextBox1.Text = (int.Parse(TextBox4.Text)- int.Parse(TextBox3.Text)).ToString();
    }
}

Posted 12-Jan-13 5:32am

sarathsprakash

Solution 1

Yes - just handle the TextChanged event for the textbox, and set the value of the other one.

C#

textbox1.Text = (int.Parse(textbox4.Text) - int.Parse(textbox3.Text)).ToString();

Clearly, you will want to put checking in there to make sure the boxes are numeric, and so forth.

Posted 12-Jan-13 4:31am

OriginalGriff

Comments

[no name] 12-Jan-13 11:17am

you didn't got my question
textbox1 textbox2 textbox3 textBox4
2000 4 80 2080
If I change textbox4 to 3000, then it will be automatically
2884.615385 4 115.3846154 3000

OriginalGriff 12-Jan-13 11:23am

Then you need to specify your goal seeking conditions...am I supposed to read your mind? :laugh:

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Sourav Sarkar-SS2 · Accepted Answer · 2013-01-12T05:43:00

this is the code

C#

double a, b, c,v,d;
           bool x = double.TryParse(textBox2.Text, out a);
           b = (a / 100) + 1;
           x = double.TryParse(textBox1.Text, out v);
           c = v / b;
           d = c * a / 100;
           c = Math.Round(c, 2);
           d = Math.Round(d, 2);
           textBox3.Text = c.ToString();
           textBox4.Text = d.ToString();