添加一个button1，添加一个ListBox1
由于ListBox1不能对于字符串换行输出，
于是，本人做了一个“循环截取的方法”
#region 对字符串循环截取
/// <summary>
/// 对字符串循环截取
/// </summary>
/// <param name="str">被截取的字符串</param>
/// <param name="Length">截取的长度</param>
/// <returns></returns>
private string[] CutString(string str,int Length)
{
int StrTotalLength = str.Length; //字符串的总长度
int ArraySize = 0; //根据Length的长度截取的份数
//被截取的字符串小于 截取的长度
if (StrTotalLength < Length)
{
MessageBox.Show("字符串的总长度小于要截取的长度，非法操作！");
return null;
//ArraySize = (StrTotalLength / Length);
}
else
{
//被截取的字符串的长度正好是整数倍
if (StrTotalLength % Length == 0)
{
ArraySize = (StrTotalLength / Length);
string[] a = new string[ArraySize];
for (int i = 0; i < ArraySize; i++)
{
a[i] = str.Substring(i * Length, Length);
}
return a;
}
else
{
try
{
//加1快数组空间
ArraySize = (StrTotalLength / Length) + 1;
string[] a = new string[ArraySize];
for (int i = 0; i < ArraySize; i++)
{
if (i != ArraySize - 1)
{
a[i] = str.Substring(i * Length , Length);
}
//对于不是整数倍StrTotalLength % Length取余的结果作为截取的长度
else
{
a[i] = str.Substring(i * Length , StrTotalLength % Length);
}
}
return a;
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
return null;
}
}
}
}
#endregion
#region 按钮
private void button3_Click(object sender, EventArgs e)
{
//定义数组来接受方法传回来的数组，数组的长度不好设定。//string abc = "00001000020000300004000050000600007";
//const int CL = 30;
//string[] b = new string[30];
//b = CutString(abc, CL);//int tiana = 0;
//if (abc.Length % CL == 0)
//{
// tiana = abc.Length / CL;
//}
//else
//{
// tiana = abc.Length / CL + 1;
//}
//for (int i = 0; i < tiana; i++)
//{
// listBox1.Items.Add(b[i]);//}
//定义动态数组ArrayList来接受方法传回来的数组。数组长度很灵活
}
string str = "00001000020000300004000050000600007";
ArrayList al = new ArrayList();
const int CL = 10; //被截取的长度
al.AddRange(CutString(str, CL));
int strCount = 0;
if (str.Length % CL == 0)
{
strCount = str.Length/CL;
}
else
{
strCount = str.Length / CL+1;
}
for (int i = 0; i < strCount; i++)
{
listBox1.Items.Add(al[i]);
}
#endregion
知识点：如何把一维数组赋值给动态数组ArrayList（注意：ArrayList只能存放一维数组）
方法有3种：
1.循环；
2.ArrayList al = new ArrayList[数组引用]；
如：int[] a = new int[] { 1, 2, 3, 4 };
ArrayList list=new ArrayList(a);
3.用ArrayList的AddRange（）方法；
如：int[] a = new int[] { 1, 2, 3, 4 };
ArrayList list=new ArrayList();
list.AddRange(a);
