C#中listView列自动适应缩放的完美效果

Posted 2022-02-24 haihong

在网上搜了很多办法，包括width=-1、-2，效果都不理想。自己摸索了个办法：

1：设计时，先把各列尺寸大体上调好；

 

2：启动时记下来各列width所占的比例。

public class colSizes : List<double>  ;
public colSizes[] grdSizes = new colSizes[3];
public DateTime dBegin = DateTime.Today;

////////
loadSizes(grd_ing, ref grdSizes[0]);
loadSizes(grd_hege, ref grdSizes[1]);
loadSizes(grd_buhege, ref grdSizes[2]);



///////////
        private void loadSizes(ListView grd, ref colSizes cs)
           //记住比例
            if (cs == null) cs = new colSizes();
            cs.Clear();
            double nAll = 0;
            foreach (ColumnHeader itm in grd.Columns) nAll += itm.Width;
            foreach (ColumnHeader itm in grd.Columns) cs.Add(itm.Width / nAll);
        

 

 

3：resize时按比例重新设置一遍各列的width.

private void setAutoSize(ListView grd, colSizes cs)
           //自动适应宽度,-1根据内容设置宽度,-2根据标题设置宽度
            if (cs == null) return;
            for (int i = 0; i < Math.Min(cs.Count, grd.Columns.Count); i++)
                grd.Columns[i].Width = (int)Math.Round(grd.ClientSize.Width * cs[i], 0);
        

private void FrmView_Resize(object sender, EventArgs e)
        
            setAutoSize(grd_ing, grdSizes[0]);
            setAutoSize(grd_hege, grdSizes[1]);
            setAutoSize(grd_buhege, grdSizes[2]);
        

 

效果相当完美，按比例缩放