使用c#+(datagrid控件)编辑xml文件

王朝vc·作者佚名 2006-01-08

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这个源码是我根据网上一个vb.net编辑xml文件的原理用c#重写的。除重用xml文件外.

并未重用任何代码！.

这小段代码，可对xml文件的记录进行删除，修改，或增加新记录。

利用了datagrid控件的sortcommand事件对xml里的记录进行排序。

email:ouyang76.263.net

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<%@page language="c#" Trace="true"%>

<%@import namespace="System.Data"%>

<%@import namespace="System.IO"%>

string xmlfile="books2.xml",xpath;

void page_load(Object obj,EventArgs e)

{

xpath=Server.MapPath(xmlfile);

if(!Page.IsPostBack)

{

Dataload("isbn");

}

void Dataload(string psort)

{

DataSet ds=new DataSet();

FileStream fs=new FileStream(xpath,FileMode.Open);

ds.ReadXml(fs);

if(ds.Tables.Count==0)

{

Response.Write("xml文件内无记录!!!!");

fs.Close();

Response.End();

}

Trace.Warn("表记录数",Convert.ToString(ds.Tables[0].Rows.Count));

DataRow dr=ds.Tables[0].NewRow();//新建一行

dr["ISBN"] = " Add ISBN";

ds.Tables[0].Rows.InsertAt(dr,0);//插入到第0行位置

Trace.Warn("表数目",Convert.ToString(ds.Tables.Count));//以红字显示调试信息

//grid1.DataSource=ds.Tables[0].DefaultView;

//grid1.DataBind();

DataView dv=new DataView(ds.Tables[0]);

Trace.Warn("字串长度:"+psort,Convert.ToString(psort.Length));//排序字符串的长度

if(psort.Length>0)

dv.Sort=psort;

grid1.DataSource=dv;

grid1.DataBind();

fs.Close();

}

void grid_sort(Object obj,DataGridSortCommandEventArgs e)

{

if(grid1.EditItemIndex==-1)

Dataload(e.SortExpression);

else

Response.Write("正在编辑暂不能排序!!");

}

void grid_edit(Object obj,DataGridCommandEventArgs e)

{

grid1.EditItemIndex=(int)e.Item.ItemIndex;

show_del("hide");

Dataload("");

}

void grid_cancel(Object obj,DataGridCommandEventArgs e)

{

grid1.EditItemIndex=-1;

show_del("show");

Dataload("");

}

void grid_update(Object obj,DataGridCommandEventArgs e)

{

int numcell=e.Item.Cells.Count;//单元格数目(e.Item是当前发生事件的表格行)

int currentrow=e.Item.DataSetIndex;

//int curr2=e.Item.ItemIndex;//与上句等价,可以不带(int)

Trace.Warn("当前更新行号 = ",Convert.ToString(currentrow));

//Trace.Warn("2当前更新行号 = ",Convert.ToString(curr2));

DataSet ds=new DataSet();

ds.ReadXml(xpath);//将xml模式和数据读取到dataSet;

DataRow dr;//表示DataTable中的一行信息.

if(currentrow==0)

dr=ds.Tables[0].NewRow();

else

dr=ds.Tables[0].Rows[e.Item.DataSetIndex - 1];

string[] str={"isbn", "author", "title", "category", "comments"};

int j=-1;

for(int i=2;i<numcell;i++)//跳过1和2column

{

j=j+1;

string ctext;

ctext=((TextBox)e.Item.Cells[i].Controls[0]).Text;

dr[str[j]] = ctext;

Trace.Warn(Convert.ToString(i)+str[j]+":每一行的文本",ctext);

}

if(currentrow==0)

{

Response.Write("加入新记录!!");

ds.Tables[0].Rows.InsertAt(dr,0);

}

ds.WriteXml(xpath);//将表示dataset的xml写入到xml文件中,包括数据和模式.

grid1.EditItemIndex = -1;//无此句仍在编辑界面

show_del("show");

Dataload("");

}

void show_del(string state)

{

string tmp=state;

switch(tmp)

{

case "show":

grid1.Columns[0].Visible = true;

break;

case "hide":

grid1.Columns[0].Visible = false;

break;

default:

grid1.Columns[0].Visible = true;

break;//也要带break

}

void initialize(Object obj,DataGridItemEventArgs e)//注意参数与其它函数不同

{

//e.Item.Cells[0].Text="aaaaa";//

if(e.Item.ItemIndex==0)//如果是第一行

{

LinkButton a0=new LinkButton();

a0=(LinkButton)e.Item.Cells[0].Controls[0];

LinkButton a1=new LinkButton();

a1=(LinkButton)e.Item.Cells[1].Controls[0];//在grid内建一个linkbutton控件

if(a0.Text=="删除")

a0.Text="";

if(a1.Text=="编辑")

a1.Text="[AddNew]";

}

void grid_del(Object obj,DataGridCommandEventArgs e)

{

Response.Write("XX");

Trace.Warn("正要删除",Convert.ToString(e.Item.ItemIndex));//控件中的行数

int curr=e.Item.ItemIndex;

DataSet ds=new DataSet();

ds.ReadXml(xpath);

DataRow dr=ds.Tables[0].Rows[curr-1];//有一行是新加的。

dr.Delete();//找到相应的数据行，将其删除

ds.WriteXml(xpath);

grid1.EditItemIndex = -1;

Dataload("");

}

</script>

<asp:datagrid id="grid1" runat="server"

alternatingitemstyle-backcolor="#eeeeee"

headerstyle-backcolor="lightyellow"

font-size="10pt"

allowsorting="true"

onsortcommand="grid_sort"

oneditcommand="grid_edit"

oncancelcommand="grid_cancel"

onupdatecommand="grid_update"

onitemcreated="initialize"

ondeletecommand="grid_del"

bordercolor="#999999"

<asp:buttoncolumn text="删除" commandname="delete"/>

<asp:editcommandcolumn buttontype="linkbutton" updatetext="更新" canceltext="取消" edittext="编辑" headertext=""/>

</columns>

</asp:datagrid>

</form>

--------------------------------------------------------------------

xml文件(文件名:books2.xml)

<?xml version="1.0" standalone="yes"?>

<books>

<book>

<author>fefdw</author>

<comments>r3rrgeqw21</comments>

</book>

<book>

<author>ssdfdfe</author>

<title>fgregre</title>

<comments>r3r3redqeq</comments>

</book>

<book>

<author>ssdfdfe</author>

<title>fgregre</title>

<comments>r3r3redqeq</comments>

</book>

<book>

<author>Tom Peters</author>

<title>Circle of Innovation</title>

<category>marketing</category>

<comments>His most recent book is his best by far!</comments>

</book>

<book>

<author>Eli Goldthrait</author>

<category>management</category>

<comments>Advocate of Theory of Constraints as applied to managment and optimization.</comments>

</book>

<book>

<author>Jeff Cox, Howard Stevens</author>

<title>Selling the Wheel</title>

<category>management</category>

<comments>Excellent Treatise/Novel on the entire Sales Cycle</comments>

</book>

<book>

<author>Alan Cooper</author>

<title>The Inmates Are Running The Asylum</title>

<category>management</category>

<comments>The father of Visual Basic and creator of the new art of Interaction Design - very valuable in designing websites. Basically the worlds most cutting edge thinker in User Interface design aimed at simplifying software use.</comments>

</book>

</books>