DataGridView高度自动调整
AutoResizeGrid.cs代码
/// <summary> /// 根据行数据,自动调整DataGridView高度 /// </summary> public sealed partial class AutoResizeGrid { private readonly DataGridView DataGrid; private readonly int MaxHeight; /// <summary> /// 是否自动调整 /// </summary> private bool IsAutoResize = true; /// <summary> /// 构造函数 /// </summary> /// <param name="dataGridView"></param> /// <param name="maxHeight">最大高度,-1 时不限制高度</param> public AutoResizeGrid(DataGridView dataGridView, int maxHeight = -1) { this.DataGrid = dataGridView; this.MaxHeight = maxHeight; if (this.IsAutoResize) { this.DataGrid.RowsAdded += DataGrid_RowsAdded; } } /// <summary> /// 行添加后事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void DataGrid_RowsAdded(object sender, DataGridViewRowsAddedEventArgs e) { this.UpdateGridHeight(); } /// <summary> /// 计算实际高度 /// </summary> /// <returns></returns> public int GetFactHeight() { // 计算实际高度 var rowsHeight = this.DataGrid.Rows.GetRowsHeight(DataGridViewElementStates.Visible); var headHeight = this.DataGrid.ColumnHeadersHeight; return (rowsHeight + headHeight); } /// <summary> /// 更新高度,调用时机,添加数据行后调用 /// </summary> private void UpdateGridHeight() { // 计算实际高度 // 多增加一行,否则会有滚动条 var factHeight = this.GetFactHeight() + this.GetHScrollBarHeight(); if (-1 == this.MaxHeight) { this.DataGrid.Height = factHeight; } else { this.DataGrid.Height = Math.Min(this.MaxHeight, factHeight); } } /// <summary> /// 获取水平滚动条高度 /// </summary> /// <returns></returns> private int GetHScrollBarHeight() { var height = 2; foreach (Control ctrl in this.DataGrid.Controls) { if (ctrl.AccessibilityObject.ToString().IndexOf("System.Windows.Forms.HScrollBar") > 0) { if (ctrl.Visible) { // do something return (height + ctrl.Height); } } } return height; } }
使用方式
new AutoResizeGrid(this.dataGridView1, maxHeight: 200);