Code to manipulate numbers and display in textBox

Question

Sir, I am in the task of creating a Windows Form Calculator. I want formula to manipulate and Display numbers in textbox. pls Help me

Pankaj Pandey · Answer

hello, i a, getting a little what you need. try below code it is for only two number multiplication or other actions. Mark as answered if helpfull string str = Textbox1.Text;//"3*5"; string result = ""; if (str.Contains("*")) { string[] val = str.Split('*'); int x = Convert.ToInt32(val[0].ToString()); int y = Convert.ToInt32(val[1].ToString()); int z = x * y; result = z.ToString(); } if (str.Contains("+")) { string[] val = str.Split('+'); int x = Convert.ToInt32(val[0].ToString()); int y = Convert.ToInt32(val[1].ToString()); int z = x + y; result = z.ToString(); } if (str.Contains("-")) { string[] val = str.Split('-'); int x = Convert.ToInt32(val[0].ToString()); int y = Convert.ToInt32(val[1].ToString()); int z = x - y; result = z.ToString(); } if (str.Contains("/")) { string[] val = str.Split('/'); int x = Convert.ToInt32(val[0].ToString()); int y = Convert.ToInt32(val[1].ToString()); int z = x / y; result = z.ToString(); } Textbox1.Text=result.tostring();

Pankaj Pandey · Answer

hello Bineesh , good to see that you got code. thanks

Bineesh Viswanath · Answer

Sir, I got the Code. Here is the Code:- using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Windows_Calculator { public partial class frmCalc : Form { enum Calc { Addition, Multiplication, Division, Subtraction, None }; bool blInteger; bool blDotPressed; double dblNum1, dblNum2; double dblMplus, dblMinus; Calc Operation; public frmCalc() { InitializeComponent(); blDotPressed = false; blInteger = true; dblNum1 = 0.0; ResetMemory(); Operation = Calc.None; } void ResetMemory() { dblMplus = 0.0; } void RefreshAll() { lblMplus.Text = ""; this.txtDisplay.Text = "0"; blInteger = true; blDotPressed = false; } void DisplayText(string text) { this.txtDisplay.Text = text; } void AppendText(string text) { this.txtDisplay.Text += text; } double SplitNumber(string Name) { return Convert.ToDouble(Name[Name.Length - 1].ToString()); } double calculateResult() { if (this.blInteger) dblNum2 = Convert.ToDouble(this.txtDisplay.Text); if (dblNum1 == 0.0) dblNum1 = dblNum2; else { switch (this.Operation) { case Calc.Addition: dblNum1 += dblNum2; break; case Calc.Division: dblNum1 /= dblNum2; break; case Calc.Multiplication: dblNum1 *= dblNum2; break; case Calc.Subtraction: dblNum1 -= dblNum2; break; } } return dblNum1; } private void btnAdd_Click(object sender, EventArgs e) { this.DisplayText(this.calculateResult().ToString()); Button Currentbtn = (Button)sender; if (Currentbtn == this.btnAdd) this.Operation = Calc.Addition; else if (Currentbtn == this.btnMultiply) this.Operation = Calc.Multiplication; else if (Currentbtn == this.btnDivide) this.Operation = Calc.Division; else if (Currentbtn == this.btnSubtract) this.Operation = Calc.Subtraction; this.blInteger = false; blDotPressed = false; } private void btnSubtract_Click(object sender, EventArgs e) { this.DisplayText(this.calculateResult().ToString()); Button Currentbtn = (Button)sender; if (Currentbtn == this.btnAdd) this.Operation = Calc.Addition; else if (Currentbtn == this.btnMultiply) this.Operation = Calc.Multiplication; else if (Currentbtn == this.btnDivide) this.Operation = Calc.Division; else if (Currentbtn == this.btnSubtract) this.Operation = Calc.Subtraction; this.blInteger = false; blDotPressed = false; } private void btnMultiply_Click(object sender, EventArgs e) { this.DisplayText(this.calculateResult().ToString()); Button Currentbtn = (Button)sender; if (Currentbtn == this.btnAdd) this.Operation = Calc.Addition; else if (Currentbtn == this.btnMultiply) this.Operation = Calc.Multiplication; else if (Currentbtn == this.btnDivide) this.Operation = Calc.Division; else if (Currentbtn == this.btnSubtract) this.Operation = Calc.Subtraction; this.blInteger = false; blDotPressed = false; } private void btnDivide_Click(object sender, EventArgs e) { this.DisplayText(this.calculateResult().ToString()); Button Currentbtn = (Button)sender; if (Currentbtn == this.btnAdd) this.Operation = Calc.Addition; else if (Currentbtn == this.btnMultiply) this.Operation = Calc.Multiplication; else if (Currentbtn == this.btnDivide) this.Operation = Calc.Division; else if (Currentbtn == this.btnSubtract) this.Operation = Calc.Subtraction; this.blInteger = false; blDotPressed = false; } private void btn0_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber=SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn1_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn2_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn3_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn4_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn5_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn6_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn7_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn8_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btn9_Click(object sender, EventArgs e) { Button Currentbtn = (Button)sender; double dblNumber = SplitNumber(Currentbtn.Name); if (blInteger) { if (this.txtDisplay.Text == "0") DisplayText(dblNumber.ToString()); else AppendText(dblNumber.ToString()); } else { this.blInteger = true; dblNum1 = Convert.ToDouble(this.txtDisplay.Text); DisplayText(dblNumber.ToString()); } } private void btnDot_Click(object sender, EventArgs e) { if (!blDotPressed) { if (blInteger) { if (this.txtDisplay.Text != "0") AppendText("."); else DisplayText("."); } else DisplayText("."); blDotPressed = true; } } private void btnMS_Click(object sender, EventArgs e) { dblMinus -= Convert.ToDouble(this.txtDisplay.Text.ToString()); this.lblMplus.Text = "-M"; } private void btnEquals_Click(object sender, EventArgs e) { this.DisplayText(calculateResult().ToString()); this.blInteger = false; } private void btnSqrt_Click(object sender, EventArgs e) { double Operand = Convert.ToDouble(this.txtDisplay.Text); Operand = Math.Sqrt(Operand); DisplayText(Operand.ToString()); } private void btnMplus_Click(object sender, EventArgs e) { dblMplus += Convert.ToDouble(this.txtDisplay.Text.ToString()); this.lblMplus.Text = "M+"; } private void btnC_Click(object sender, EventArgs e) { RefreshAll(); } private void btnMC_Click(object sender, EventArgs e) { this.dblMplus = 0.0; } private void Form1_Load(object sender, EventArgs e) { this.txtDisplay.Focus(); } } }

Pankaj Pandey · Answer

are you using a "=" button to show the result? you can put this code at button event which do you want to show result. just like window calculater programm.

Bineesh Viswanath · Answer

Actually by seeing this Code, i didn't get an idea where to place this statements. anyway thank you for the solution.

Pankaj Pandey · Answer

hello, You can also use switch-case on place of if-control statement in my given code. thanks

Bineesh Viswanath · Answer

I am in Creating a calculator same as Windows XP I am using only one textbox. I want to perform all functions which a calculator does. I passed the button value to textbox. but i can't write code for addition, multiplication,division and subtraction of two numbers. Help me to find the formula to Calculate and Display the result in same Textbox.

Pankaj Pandey · Answer

hello, Kindly explain your que a little more. I Didn't get your actual requirment. thanks