我在win32控制台应用程序中使用了libcurl，它工作正常。我遵循了这里的指示。 http://theetrain.ca/tech/installing-curl-using-visual-studio-2010-beginners-guide/。现在我想在Windows窗体应用程序中使用Lib curl。但它显示出一些错误。Visual C++ 2010 Express Edition中的Windows窗体应用程序中的Libcurl错误
1>阅读网站app.obj：错误LNK2031：无法为“extern”生成p/invoke C“void * __clrcall curl_easy_init（void）”（？curl_easy_init @@ $$ J0YMPAXXZ）;调用约定缺少元数据 1>阅读网站app.obj：错误LNK2028：无法解析令牌（0A000011）“extern”C“void * __clrcall curl_easy_init（void）”（？curl_easy_init @@ $$ J0YMPAXXZ）在函数“private： void __clrcall Readwebsiteapp :: Form1 :: button1_Click（class System :: Object ^，class System :: EventArgs ^）“（？button1_Click @ Form1 @ Readwebsiteapp @@ $$ FA $ AAMXP $ AAVObject @ System @@ P $ AAVEventArgs @ 4 @@ Z） 1>阅读网站app.obj：错误LNK2019：无法解析的外部符号“extern”C“void * __clrcall curl_easy_init（void）”（？curl_easy_init @@ $$ J0YMPAXXZ）在函数“private：void __clrcall中引用Readwebsiteapp :: Form1 :: button1_Click（class System :: Object ^，class System :: EventArgs ^）“（？button1_Click @ Form1 @ Readwebsiteapp @@ $$ FA $ AAMXP $ AAVObject @ System @@ P $ AAVEventArgs @ 4 @@ Z ） 1> C：\ Documents and Settings \ nemo1 \ my documents \ visual studio 2010 \ Projects \ Readwebsiteapp \ Debug \ Read网站app.exe：致命错误LNK1120：2个未解决的外部问题
请给我一些建议来解决这个问题。谢谢。我的代码是：
#define CURL_STATICLIB
#include <stdio.h>
#include <curl/curl.h>
#include <curl/types.h>
#include <curl/easy.h>
#include <string.h>
using namespace std;
#pragma once
namespace Readwebsiteapp {
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;
}
}
private: System::Windows::Forms::Button^ button1;
protected:
private: System::Windows::Forms::TextBox^ textBox1;
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->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::Point(120, 70);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"button1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
//
// textBox1
//
this->textBox1->Location = System::Drawing::Point(120, 153);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(100, 20);
this->textBox1->TabIndex = 1;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(420, 337);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e)
{
textBox1->Text = "hello";
CURL *curl;
CURLcode result;
curl = curl_easy_init();
}
};
}