c#读Word文件,最后彻底释放资源

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private void button5_Click(object sender, System.EventArgs e)

{

object filename="D:\\nettest\\window\\serial\\a.doc"; //要打开的文档路径

string strKey="正文"; //要搜索的文本

object MissingValue=Type.Missing;

object oMissing = System.Reflection.Missing.Value;

Word.Application wp=new Word.ApplicationClass();

Word.Document wd=wp.Documents.Open(ref filename,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue);

if (wd.Content.Text.IndexOf(strKey)>=0)

{

MessageBox.Show("文档中包含指定的关键字！","搜索结果",MessageBoxButtons.OK);

}

else

{

MessageBox.Show("文档中没有指定的关键字！","搜索结果",MessageBoxButtons.OK);

}

wd.Close(ref oMissing, ref oMissing, ref oMissing);

System.Runtime.InteropServices.Marshal.ReleaseComObject (wd);

wd = null;

wp.Quit(ref oMissing, ref oMissing, ref oMissing);

System.Runtime.InteropServices.Marshal.ReleaseComObject (wp);

wp = null;

System.GC.Collect();

}

private void button6_Click(object sender, System.EventArgs e)

{

object filename="D:\\nettest\\window\\serial\\a.doc"; //要打开的文档路径

string strKey="正文"; //要搜索的文本

object MissingValue=Type.Missing;

object oMissing = System.Reflection.Missing.Value;

Word.Application wp=new Word.ApplicationClass();

Word.Document wd=wp.Documents.Open(ref filename,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue);

wd.Content.Find.Text=strKey;

if (wd.Content.Find.Execute(ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue))

{

MessageBox.Show("文档中包含指定的关键字！","搜索结果",MessageBoxButtons.OK);

}

else

{

MessageBox.Show("文档中没有指定的关键字！","搜索结果",MessageBoxButtons.OK);

}

wd.Close(ref oMissing, ref oMissing, ref oMissing);

System.Runtime.InteropServices.Marshal.ReleaseComObject (wd);

wd = null;

wp.Quit(ref oMissing, ref oMissing, ref oMissing);

System.Runtime.InteropServices.Marshal.ReleaseComObject (wp);

wp = null;

System.GC.Collect();

}

private void button7_Click(object sender, System.EventArgs e)

{

object filename="D:\\nettest\\window\\serial\\a.doc"; //要打开的文档路径

string strKey="正文"; //要搜索的文本

object MissingValue=Type.Missing;

object oMissing = System.Reflection.Missing.Value;

Word.Application wp=new Word.ApplicationClass();

Word.Document wd=wp.Documents.Open(ref filename,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue);

wd.Content.Find.Text=strKey;

int i=0,iCount=0;

Word.Find wfnd;

if (wd.Paragraphs!=null && wd.Paragraphs.Count>0)

{

iCount=wd.Paragraphs.Count;

for(i=1;i<=iCount;i++)

{

wfnd=wd.Paragraphs[i].Range.Find;

wfnd.ClearFormatting();

wfnd.Text=strKey;

if (wfnd.Execute(ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue,ref MissingValue,

ref MissingValue))

{

MessageBox.Show("文档中包含指定的关键字！","搜索结果",MessageBoxButtons.OK);

break;

}

}

}

wd.Close(ref oMissing, ref oMissing, ref oMissing);

System.Runtime.InteropServices.Marshal.ReleaseComObject (wd);

wd = null;

wp.Quit(ref oMissing, ref oMissing, ref oMissing);

System.Runtime.InteropServices.Marshal.ReleaseComObject (wp);

wp = null;

System.GC.Collect();

}