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[ASP.net教程]winform水平滚动条联动panel


需求:

滚动滚动条时显示pnlBack里面的button

文本框里输入数字,改变每行显示的按钮数

源码如下:

/// <summary>/// 窗体加载/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void Form1_Load(object sender, EventArgs e){  InitialButtons();}/// <summary>/// 往pnlBack中添加button并联动水平滚动条/// </summary>/// <param name="a">每行显示的button数,默认为15</param>private void InitialButtons(int a = 15){  //初始化显示在pnlBack里面的button  if (txtCols.Text.Trim() != "")  {    int.TryParse(txtCols.Text.Trim(), out a);    if (a <= 0)    {      a = 15;    }  }  pnlBack.Controls.Clear();  for (int i = 0; i < 60; i++)  {    Button btn = new Button();    btn.Size = new Size(140, 80);    btn.Text = "Text" + (i + 1);    if (i < a)    {      btn.Location = new Point(i * 140 + (i + 1) * 10, 10);    }    else if (i < 2 * a)    {      btn.Location = new Point((i - a) * 140 + (i + 1 - a) * 10, 100);    }    else if (i < 3 * a)    {      btn.Location = new Point((i - 2 * a) * 140 + (i + 1 - 2 * a) * 10, 190);    }    else    {      btn.Location = new Point((i - 3 * a) * 140 + (i + 1 - 3 * a) * 10, 280);    }    pnlBack.Controls.Add(btn);  }  pnlBack.Width = 10 + (10 + 140) * a;  //初始化水平滚动条  Hsb.Maximum = pnlBack.Width + 20;  Hsb.Minimum = 0;  Hsb.LargeChange = pnlOwner.Width;  Hsb.SmallChange = 5;}//水平滚动条滚动private void Hsb_Scroll(object sender, ScrollEventArgs e){  pnlBack.Left = pnlBack.Left - (e.NewValue - e.OldValue);}//更改每行的按钮数目private void btnOk_Click(object sender, EventArgs e){  InitialButtons();}