Question

我正在尝试使用Windows应用来计算GPA。用户可以输入主题数量，应用程序创建与主题数量一样多的文本框。但我无法从文本框中获取值。这是我正在尝试的代码

private void button1_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < int.Parse(textBox1.Text); i++)
        {
            Label supjects = new Label();
            supjects.Text = "supject " + (i+1) ;
            supjects.Location = new System.Drawing.Point(60, 70+i*41);
            supjects.Name = "supject" + i;
            this.Controls.Add(supjects);

            TextBox fullMark = new TextBox();
            fullMark.Location = new System.Drawing.Point(162, 70 + i * 41);
            fullMark.Size=new System.Drawing.Size(57, 24);
            fullMark.Name = "fullMark" + i;
            this.Controls.Add(fullMark);

            TextBox yourMark = new TextBox();
            yourMark.Location = new System.Drawing.Point(272, 70 + i * 41);
            yourMark.Size = new System.Drawing.Size(57, 24);
            yourMark.Name = "yourMark" + i;
            this.Controls.Add(yourMark);


        }

Answer 1

声明像

这样的字典

Dictionary<string, TextBox> textBoxes = new Dictionary<string, TextBox>();

将循环中的文本框添加到其中。

 textBoxes.Add("yourMark" + i, yourMark);

现在您可以像

一样使用它

var text = textBoxes["yourMark2"].Text

Answer 2

for (int i = 0; i < int.Parse(textBox1.Text); i++)
    {
        Label l = this.Controls.Find("supject" + i,true)[0] as Label;
        l.Text = "yes";
        //whatever
     }

找到YourMark，它标签l = this.Controls.Find（＆＃34; YourMark＆＃34;，true）[0]为标签;

从动态创建的texbox中获取文本

2 个答案: