C#（WinForm）常用小知识点

一）C#遍历容器中的控件代码1：private List<Control> find(Control c, Type t)  //c 为容器控件,  t 为所选类型{     List<Control> controls = new List<Control>();     foreach (Control cc in c.Controls)     {          if (cc.GetType() == t)              controls.Add(cc);     }     return controls;}

代码2：

public List<TextBox> getTextBoxList() {            try            {                List<TextBox> lstText = new List<TextBox>();                IEnumerator ier = this.panel1.Controls.GetEnumerator();                while (ier.MoveNext())                {                    if (ier.Current is TextBox)                    {                        TextBox a = ier.Current as TextBox;                        lstText.Add(a);                    }                }                return lstText;            }            catch (Exception ex)            {                System.Diagnostics.Debug.WriteLine(ex.Message);            }            return null; }

二）c#中如何得到一个文本串的宽度（以像素px为单位）

 

.NET 的 System.Drawing 空间中，Graphics 对象提供了能达到此目的的方法：MeasureString()        public void PrintOutBox(string printStr,int printWidth,string printAlingment,System.Windows.Forms.PaintEventArgs g)   {             int x1 = CurrentX;             int y1= CurrentY;             int t_space=2;             SizeF sf=g.MeasureString(printStr,printFont());// printFont()为返回类型为Font的方法             Rectangle rec1 = new Rectangle(CurrentX, CurrentY, printWidth, (int)(sf.Height + t_space));             g.DrawRectangle(Pens.Black,rec1);             if (printAlingment == "r" | printAlingment == "R")             {                 CurrentX = x1 + printWidth - (int)sf.Width;                 CurrentY = y1 +  (t_space / 2);             }             g.DrawString(printStr, printFont(), Brushes.Black, CurrentX, CurrentY);   }

 

转载于:https://www.cnblogs.com/feima-lxl/archive/2010/06/30/1767973.html

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