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String - Int- String Conversion

tejas1995 (58)
I am using Windows Forms on Visual C++ 2010. I am creating a very simple program. I will take in the input from TextBox1, make some calculations and print out in Label3. For this, I need to convert the string in TextBox1 into an integer and, after the calculations, convert the integer back into a string. This part of the code is in bold.

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#pragma once
#include <iostream>
#include <sstream>



namespace TemperatureConverter {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Summary for Form1
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}

	protected: 
	private: System::Windows::Forms::Button^  button1;
	private: System::Windows::Forms::ListBox^  listBox1;
	private: System::Windows::Forms::ListBox^  listBox2;
	private: System::Windows::Forms::Label^  label2;
	private: System::Windows::Forms::TextBox^  textBox1;

	private: 
	private: System::Windows::Forms::Label^  label3;
	private: System::Windows::Forms::Label^  label4;
	private: System::Windows::Forms::Label^  label1;
	public: 


	private: 




	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->button1 = (gcnew System::Windows::Forms::Button());
			this->listBox1 = (gcnew System::Windows::Forms::ListBox());
			this->listBox2 = (gcnew System::Windows::Forms::ListBox());
			this->label2 = (gcnew System::Windows::Forms::Label());
			this->textBox1 = (gcnew System::Windows::Forms::TextBox());
			this->label3 = (gcnew System::Windows::Forms::Label());
			this->label4 = (gcnew System::Windows::Forms::Label());
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->SuspendLayout();
			// 
			// button1
			// 
			this->button1->BackColor = System::Drawing::Color::Red;
			this->button1->BackgroundImageLayout = System::Windows::Forms::ImageLayout::Center;
			this->button1->Cursor = System::Windows::Forms::Cursors::Hand;
			this->button1->FlatStyle = System::Windows::Forms::FlatStyle::System;
			this->button1->Font = (gcnew System::Drawing::Font(L"Impact", 24, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->button1->Location = System::Drawing::Point(209, 434);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(136, 47);
			this->button1->TabIndex = 1;
			this->button1->Text = L"Convert";
			this->button1->UseVisualStyleBackColor = false;
			this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
			// 
			// listBox1
			// 
			this->listBox1->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->listBox1->FormattingEnabled = true;
			String^ str = "Select Unit";
			String^ str2 = "Celsius";
			String^ str3 = "Farhenheit";
			String^ str4 = "Kelvin";
			this->listBox1->SelectionMode = System::Windows::Forms::SelectionMode::MultiExtended;
			this->listBox1->Items->AddRange(gcnew cli::array<System::String^ >(4) {str, str2, str3, str4});
			this->listBox1->ItemHeight = 24;
			this->listBox1->Location = System::Drawing::Point(11, 129);
			this->listBox1->Name = L"listBox1";
			this->listBox1->Size = System::Drawing::Size(170, 28);
			this->listBox1->TabIndex = 2;
			// 
			// listBox2
			// 
			this->listBox2->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->listBox2->FormattingEnabled = true;
			this->listBox2->ItemHeight = 24;
			this->listBox2->SelectionMode = System::Windows::Forms::SelectionMode::MultiExtended;
			this->listBox2->Items->AddRange(gcnew cli::array<System::String^ >(4) {str, str2, str3, str4});
			this->listBox2->Location = System::Drawing::Point(377, 129);
			this->listBox2->Name = L"listBox2";
			this->listBox2->Size = System::Drawing::Size(170, 28);
			this->listBox2->TabIndex = 3;
			this->listBox2->SelectedIndexChanged += gcnew System::EventHandler(this, &Form1::listBox2_SelectedIndexChanged);
			// 
			// 
			// textBox1
			// 
			this->textBox1->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
			this->textBox1->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->textBox1->Location = System::Drawing::Point(11, 202);
			this->textBox1->Name = L"textBox1";
			this->textBox1->Size = System::Drawing::Size(169, 29);
			this->textBox1->TabIndex = 5;
			// 
			// label3
			// 
			this->label3->BackColor = System::Drawing::SystemColors::HighlightText;
			this->label3->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
			this->label3->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->label3->Location = System::Drawing::Point(375, 202);
			this->label3->Name = L"label3";
			this->label3->Size = System::Drawing::Size(170, 26);
			this->label3->TabIndex = 6;
			this->label3->Click += gcnew System::EventHandler(this, &Form1::label3_Click);
			// 
			// label4
			// 
			this->label4->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 15.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->label4->ForeColor = System::Drawing::Color::Red;
			this->label4->Location = System::Drawing::Point(155, 320);
			this->label4->Name = L"label4";
			this->label4->Size = System::Drawing::Size(262, 37);
			this->label4->TabIndex = 7;
			// 
			// label1
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->BackColor = System::Drawing::SystemColors::InactiveCaption;
			this->ClientSize = System::Drawing::Size(561, 514);
			this->Controls->Add(this->label4);
			this->Controls->Add(this->label3);
			this->Controls->Add(this->textBox1);
			this->Controls->Add(this->label2);
			this->Controls->Add(this->listBox2);
			this->Controls->Add(this->listBox1);
			this->Controls->Add(this->button1);
			this->Controls->Add(this->label1);
			this->Cursor = System::Windows::Forms::Cursors::Default;
			this->Name = L"Form1";
			this->Text = L"Temperature Converter";
			this->ResumeLayout(false);
			this->PerformLayout();

		}
#pragma endregion

public: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
			std::string text = textBox1->Text;
			int Result;
			std::stringstream convert(text);
			if ( !(convert >> Result) )
				Result = 0;
			int x = Result + 10;
			String^ valueString = Convert::ToString(x);
			label3->Text = valueString;
		 }

};
}


When I run the code, I get this error:

error C2440: 'initializing' : cannot convert from 'System::String ^' to 'std::basic_string<_Elem,_Traits,_Ax>'

Can somebody please help me? I am new to this, so please try to keep your explanations as simple as possible.

Thanks
Tejas
tejas1995 (58)
Can somebody please help me ?
Athar (4466)
It's the wrong forum for this. This is a C++ forum, however the language you seem to be using is called C++/CLI.
closed account (1vRz3TCk)
tejas1995,
If you are going to use .net [via C++/CLI] then I suggest you learn it and not try mixing managed an unmanaged code, life will be much easier.
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private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) 
             {
                 int result = 0;
                 Int32::TryParse(textBox1->Text, result);
                 result +=10;
                 label3->Text = result.ToString();
             }
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