向面板添加控件，并且控件不再显示c＃

Question

I have one textbox (textBox1) and panel (Panel1) I have code like this

Panel1.Controls.Add(textBox1)

so when I run it I can't see textbox anymore, If I do like this I can see textBox

textBox1.Location  = Panel1.Location

can anyone tell me what's problem?

Answer 1

When a textbox (or any control) is part of a panel the top left of the panel is point(0.0);

so when textBox1.Location = Panel1.Location the textbox probably falls out of view in the panel.

try something like this instead/

        // 
        // panel1
        // 
        this.panel1.Controls.Add(this.textBox1);
        this.panel1.Location = new System.Drawing.Point(59, 27);
        this.panel1.Name = "panel1";
        this.panel1.Size = new System.Drawing.Size(193, 176);
        this.panel1.TabIndex = 1;
        // 
        // textBox1
        // 
        this.textBox1.Location = new System.Drawing.Point(0, 0);
        this.textBox1.Name = "textBox1";
        this.textBox1.Size = new System.Drawing.Size(100, 20);
        this.textBox1.TabIndex = 0;

Answer 2

I believe the reason you're not able to see the Textbox has to do with the Panel's properties. Try setting the AutoSize property to true and the AutoSizeMode property to GrowAndShrink .