概述
動態創建添加控件，可以在一個大容器里一次性放入多個控件。例：根據文本框中輸入的數字 給flowLayoutPanel1 添加多少個button。窗體設計中，需要什么控件就從工具箱里拖出一個控件“掛”在窗體上。其實，窗體上的控件，不但可以“拖”，還可以用代碼動態生成。動態生成控件，對需要相同的大量的控件還是比較有用的。
實現方式
1、加載數據，往panel添加Label 控件。
private void LoadRoomType() { DataTable dtRoomType = _roomTypeBLL.GetModelList("", "Code"); pnlRoomType.Controls.Clear(); int padding = 5; int x = padding, y = padding; pnlRoom.Controls.Clear(); foreach (DataRow item in dtRoomType.Rows) { Label lbl = new Label(); lbl.Text = string.Format("{0}", item["Names"]); lbl.Image = btnRoomType.Image; lbl.Cursor = Cursors.IBeam; lbl.TextAlign = btnRoomType.TextAlign; lbl.Font = btnRoomType.Font; lbl.ForeColor = btnRoomType.ForeColor; lbl.Size = btnRoomType.Size; lbl.Location = new Point(x, y); lbl.Tag = item; lbl.Click += new EventHandler(lbl_Click); lbl.MouseEnter += new EventHandler(lbl_MouseEnter); lbl.MouseLeave += new EventHandler(lbl_MouseLeave); x += lbl.Width + padding; if (x + lbl.Width > pnlRoomType.Width) { x = padding; y += lbl.Height + padding; } pnlRoomType.Controls.Add(lbl); } int height = y + (x != padding ? pnlRoomType.Height : 0) + padding; int addHeight = height - pnlRoomType.Height; pnlRoom.Top = pnlRoom.Top + addHeight; pnlRoom.Height = pnlRoom.Height - addHeight; pnlRoomType.Height = pnlRoomType.Height + addHeight; if (dtRoomType.Rows.Count > 0) LoadRoomByTypeID(dtRoomType.Rows[0], 0); }
2、定義Label 的點擊事件。
void lbl_Click(object sender, EventArgs e) { try { Label lbl = sender as Label; DataRow row = lbl.Tag as DataRow; LoadRoomByTypeID(row, 0); } catch (Exception ex) {
; }
}
3、定義Label 的鼠標事件。
#region lbl_MouseLeave void lbl_MouseLeave(object sender, EventArgs e) { Label lbl = sender as Label; lbl.Font = new Font(lbl.Font, FontStyle.Regular); lbl.Cursor = Cursors.Default; lbl.ForeColor = btnRoomType.ForeColor; } #endregion #region lbl_MouseEnter void lbl_MouseEnter(object sender, EventArgs e) { Label lbl = sender as Label; lbl.Font = new Font(lbl.Font, FontStyle.Bold); lbl.Cursor = Cursors.IBeam; } #endregion
效果
該文章在 2024/10/19 12:24:09 編輯過
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