在文档中搜索和替换字符串,先在word文档中标记字符串,然后再搜索标记字符串并用新的字符串替换标记字符串.主要是先选择整个文档,然后使用Find的Execute方法查找指定字符串并替换为相应字符串.

以下实现方式之一,使用文档(Document )对象的 Content 属性选择整个文档。
///<summary>
                /// 在word 中查找一个字符串直接替换所需要的文本
                /// </summary>
                /// <param name="strOldText">原文本</param>
                /// <param name="strNewText">新文本</param>
                /// <returns></returns>
                public bool Replace(string strOldText,string strNewText)
                {
                        this.oDoc.Content.Find.Text = strOldText ;
                        object FindText,    ReplaceWith, Replace ;//    
                        object MissingValue = Type.Missing;    
                        FindText = strOldText ;//要查找的文本
                        ReplaceWith = strNewText ;//替换文本
                             Replace = Word.WdReplace.wdReplaceAll ;/**//*wdReplaceAll - 替换找到的所有项。
                                                                                                            * wdReplaceNone - 不替换找到的任何项。
                                                                                                        * wdReplaceOne - 替换找到的第一项。
                                                                                                        * */

                        this.oDoc.Content.Find.ClearFormatting();//移除Find的搜索文本和段落格式设置
                        if (this.oDoc.Content.Find.Execute(
                                ref FindText,ref MissingValue,
                                ref MissingValue,ref MissingValue,
                                ref MissingValue,ref MissingValue,
                                ref MissingValue,ref MissingValue,ref MissingValue,
                                ref ReplaceWith,ref Replace,
                                ref MissingValue,ref MissingValue,
                                ref MissingValue,ref MissingValue))
                        {
                                return true ;
                        }
                        return false ;
                        
                }
 
说明:其中oDoc是一个word文档的Document对象.


 
此外还可以 运用Word Application 对象Selection的Find.
public bool SearchReplace(string strOldText,string strNewText)
                {    
                        object replaceAll = Word.WdReplace.wdReplaceAll;    
                        object missing = Type.Missing;    
                        
                                //首先清除任何现有的格式设置选项,然后设置搜索字符串 strOldText。
                        this.oWordApplic.Selection.Find.ClearFormatting();    
                        oWordApplic.Selection.Find.Text = strOldText;    

                        oWordApplic.Selection.Find.Replacement.ClearFormatting();    
                        oWordApplic.Selection.Find.Replacement.Text = strNewText;    

                        if (oWordApplic.Selection.Find.Execute(
                                ref missing, ref missing, ref missing, ref missing, ref missing,    
                                ref missing, ref missing, ref missing, ref missing, ref missing,
                                ref replaceAll, ref missing, ref missing, ref missing, ref missing))
                        {
                                return true ;
                        }
                        return false ;
                }
注:oWordApplic是一个Word Application 对象

   Find.Execute 方法详细介绍请看文档:http://msdn2.microsoft.com/zh-cn/library/microsoft.office.interop.word.find.execute(en-us,VS.80).aspx