字符串数组保存为字符串,arraylist转换成string数组

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                    //把字符串数组保存为字符串
                    string[] strArray = new string[listView1.Items.Count];
                    for (int i = 0; i < listView1.Items.Count; i++)
                    ...{
                       strArray.SetValue(listView1.Items[i].Text+",", i);
                    }
                    string b = string.Concat(strArray);
                    MessageBox.Show(b.TrimEnd(','));
                    dataField.ToArray(strDataFields);

                    string[] strDataFields = (string[])dataField.ToArray(typeof(string));//arraylist转换成string数组

                    MessageBox.Show(string.Concat(strDataFields).TrimEnd(','));