windowsForm开发如何取tableLayoutPanel中控件的值

Z时代
2024-01-10
分类：技术分享

1.背景：

动态创建了一张tableLayoutPanel表（例如：根据用户操作面板上入力：行为3，列为2，点击按钮生成3行2列的tableLayoutPanel），并且在表的里面各加入了comboBox控件

2.问题：

如何取得tableLayoutPanel表格中各个ComboBox控件的当前显示值？（例如：取表格的（1，1）中ComboBox的值[苹果]，如，用户选择了“苹果”）

3.想法：

先动态创建tableLayoutPanel，然后用循环创建N（例如：6个）个comboBox，放到对应的tableLayoutPanel表格中。

4.开发语言：

vs C++/CLR

5希望：

求大神指教方法，或者具体功能的代码（C++/CLR的代码或者C#的dai'ma）

6.简略代码：

下面的函数在InitializeComponent（）中执行

void add(Col_Num,Row_Num)

{

省略

int indexNum = 0;
for ( int i = 0; i < Col_Num; i++ )
{
for ( int j = 0; j < Row_Num; j++ )
{
省略
this->comboBox_display = gcnew ComboBox();
//
//comboBox_display
//
this->comboBox_display->AddRange(strItem);  //strItem里面为"苹果","梨"
this->comboBox_display->name = "comboBox_" + indexNum;
this->comboBox_display->Text = "";
this->comboBox_display->SelectedIndexChanged += gcnew System::EventHandler(this,&Form,CcomboBox_display_SelectedIndexChanged); //创建触发事件
......
//还有其他几个属性
省略
this->tableLayoutPanel_display->add(this->comboBox_display,i,j);  //把comboBox控件添加到对应的表格里面
省略
indexNum++;
}
}

}

回答

#pragma once
namespace Q1092586 {
    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::TableLayoutPanel^  tableLayoutPanel1;
    private: System::Windows::Forms::Button^  button1;
    protected: 
    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->tableLayoutPanel1 = (gcnew System::Windows::Forms::TableLayoutPanel());
            this->button1 = (gcnew System::Windows::Forms::Button());
            this->SuspendLayout();
            // 
            // tableLayoutPanel1
            // 
            this->tableLayoutPanel1->ColumnCount = 2;
            this->tableLayoutPanel1->ColumnStyles->Add((gcnew System::Windows::Forms::ColumnStyle(System::Windows::Forms::SizeType::Percent, 
                50)));
            this->tableLayoutPanel1->ColumnStyles->Add((gcnew System::Windows::Forms::ColumnStyle(System::Windows::Forms::SizeType::Percent, 
                50)));
            this->tableLayoutPanel1->Location = System::Drawing::Point(63, 30);
            this->tableLayoutPanel1->Name = L"tableLayoutPanel1";
            this->tableLayoutPanel1->RowCount = 2;
            this->tableLayoutPanel1->RowStyles->Add((gcnew System::Windows::Forms::RowStyle(System::Windows::Forms::SizeType::Percent, 50)));
            this->tableLayoutPanel1->RowStyles->Add((gcnew System::Windows::Forms::RowStyle(System::Windows::Forms::SizeType::Percent, 50)));
            this->tableLayoutPanel1->Size = System::Drawing::Size(386, 264);
            this->tableLayoutPanel1->TabIndex = 0;
            // 
            // button1
            // 
            this->button1->Location = System::Drawing::Point(498, 361);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(88, 25);
            this->button1->TabIndex = 1;
            this->button1->Text = L"button1";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(609, 409);
            this->Controls->Add(this->button1);
            this->Controls->Add(this->tableLayoutPanel1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->ResumeLayout(false);
        }
#pragma endregion
    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 add(2,2);
             }
             System::Void add(int Col_Num, int Row_Num){
                int indexNum = 0;
                array<String^>^ strItem = {"苹果", "梨","a","b"};
                for ( int i = 0; i < Col_Num; i++ )
                {
                    for ( int j = 0; j < Row_Num; j++ )
                    {
                        ComboBox^ comboBox_display = gcnew ComboBox();
                        //
                        //comboBox_display
                        //
                        comboBox_display->Items->AddRange(strItem);  //strItem里面为"苹果","梨"
                        comboBox_display->Name = "comboBox_" + indexNum;
                        comboBox_display->Text = "";
                        //comboBox_display->SelectedIndexChanged += gcnew System::EventHandler(this,&Form,CcomboBox_display_SelectedIndexChanged); //创建触发事件
                        tableLayoutPanel1->Controls->Add(comboBox_display, i, j);  //把comboBox控件添加到对应的表格里面
                        indexNum++;
                    }
                }
            }
    private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
                 int i = 1;
                 int j = 0;
                 MessageBox::Show(((ComboBox^)tableLayoutPanel1->Controls[i * 2 + j])->Text);
             }
};
}