动态改变gridview列宽度函数分享

public  void SetGridViewWidth(GridView gridview1)
        {
            int rowcount = gridview1.Rows.Count;   //行数
            int colcount = gridview1.Columns.Count;  //列数
            int i=0,j=0;
            int[] cellwidth = new int[colcount];   //数组用来存储各个列的最大字符数
            int gridviewwidth = 0;  //GridView宽度
            Unit width = 0; 
            string temp = null;
            int tempLength = 0;

            for (i = 0; i < rowcount; i++)     //循环数据项，获得各个列的最大字符宽度
            {
                for (j = 0; j < colcount; j++)
                {
                    temp = gridview1.Rows[i].Cells[j].Text;
                    tempLength = LengthOfLetter(temp);      //LengthOfLetter()返回含中文的字符串字符宽度，1个汉字2个字符宽
                    if (cellwidth[j] < tempLength)
                    {
                        cellwidth[j] = tempLength;        //存储较大宽度值
                    }

                }
            }

          

            for (j = 0; j < colcount; j++)
            {
                if (gridview1.HeaderRow.Visible == true)      //如果GridView表头可见，将表头列宽参与比较                {
                    temp = gridview1.HeaderRow.Cells[j].Text;
                    tempLength = LengthOfLetter(temp);
                    if (cellwidth[j] < tempLength)
                    {
                        cellwidth[j] = tempLength;
                    }
                }

                if (gridview1.FooterRow.Visible == true)    //如果GridView表尾可见，将表尾列宽参与比较                {
                    temp = gridview1.FooterRow.Cells[j].Text;
                    tempLength = LengthOfLetter(temp);
                    if (cellwidth[j] < tempLength)
                    {
                        cellwidth[j] = tempLength;
                    }
                }

            }

            for (j = 0; j < colcount; j++)
            {
                if (gridview1.Columns[j].Visible == true)     //将显示的列的各列最大字符宽度相加                {
                    gridviewwidth += cellwidth[j];
                }
            }

            width = gridviewwidth * oneLetterLength;  //GridView最大字符数乘于一个字符显示宽度得到GridView显示宽度
            if (gridview1.Width.Value < width.Value)    //如果在界面上已经设置了GridView的宽度，将动态求的宽度和页面上的
               {                                                              //初始化宽度比较，如果初始化宽度较小则将宽度设置为新调整的宽度。
                     gridview1.Width = width;
                }

        }

       //含有中文的字符串等效英文字符串显示长度

        public  int LengthOfLetter(string temp) 
        {
            int length = temp.Length;
            int newlength = temp.Length;

            for (int i = 0; i < length; i++)         //遍历字符串每个字符
            {
                if (IsChineseLetter(temp, i))     //IsChineseLetter()判断是否为中文字符，是则宽度加1
                {
                    newlength++;
                }
            }
            return newlength;

        }

   //判断是否为中文字符
     public  bool  IsChineseLetter(string input,int index)
        {
            int code = 0;
            int chfrom = Convert.ToInt32("4e00", 16);    //范围（0x4e00～0x9fff）转换成int（chfrom～chend）
            int chend = Convert.ToInt32("9fff", 16);
            if (input != "")
            {
                code = Char.ConvertToUtf32(input, index);    //获得字符串input中指定索引index处字符unicode编码
               
               if (code >= chfrom && code <= chend)    
               {
                    return true;     //当code在中文范围内返回true

                }
               else
               {
                     return false ;    //当code不在中文范围内返回false
               }
            }

            return false;
        }