/// <summary>
/// 替换word中的文字
/// </summary>
/// <param name="filePath">文件的路径</param>
/// <param name="strOld">查找的文字</param>
/// <param name="strNew">替换的文字</param>
private void WordReplace(string filePath, string strOld, string strNew)
{
Microsoft.Office.Interop.Word._Application app = new Microsoft.Office.Interop.Word.ApplicationClass();
object nullobj = System.Reflection.Missing.Value;
object file = filePath;
Microsoft.Office.Interop.Word._Document doc = app.Documents.Open(
ref file, ref nullobj, ref nullobj,
ref nullobj, ref nullobj, ref nullobj,
ref nullobj, ref nullobj, ref nullobj,
ref nullobj, ref nullobj, ref nullobj,
ref nullobj, ref nullobj, ref nullobj, ref nullobj) as Microsoft.Office.Inte