///
<summary>
///
从XML文件中读取一个DataTable
///
</summary>
///
<param name="dt">
数据源
</param>
///
<param name="address">
XML文件地址
</param>
///
<returns></returns>
public
static
DataTable
ReadFromXml(
string
address)
{
DataTable
dt =
new
DataTable
();
try
{
if
(!
File
.Exists(address))
{
throw
new
Exception
(
"文件不存在!"
);
}
XmlDocument
xmlDoc =
new
XmlDocument
();
xmlDoc.Load(address);
XmlNode
root = xmlDoc.SelectSingleNode(
"DataTable"
);
//读取表名
dt.TableName = ((
XmlElement
)root).GetAttribute(
"TableName"
);
//Console.WriteLine("读取表名： {0}", dt.TableName);
//读取行数
int
CountOfRows = 0;
if
(!
int
.TryParse(((
XmlElement
)root).
GetAttribute(
"CountOfRows"
).ToString(),
out
CountOfRows))
{
throw
new
Exception
(
"行数转换失败"
);
}
//读取列数
int
CountOfColumns = 0;
if
(!
int
.TryParse(((
XmlElement
)root).
GetAttribute(
"CountOfColumns"
).ToString(),
out
CountOfColumns))
{
throw
new
Exception
(
"列数转换失败"
);
}
//从第一行中读取记录的列名
foreach
(
XmlAttribute
xa
in
root.ChildNodes[0].Attributes)
{
dt.Columns.Add(xa.Value);
//Console.WriteLine("建立列： {0}", xa.Value);
}
//从后面的行中读取行信息
for
(
int
i = 1; i < root.ChildNodes.Count; i++)
{
string
[] array =
new
string
[root.ChildNodes[0].Attributes.Count];
for
(
int
j = 0; j < array.Length; j++)
{
array[j] = root.ChildNodes[i].Attributes[j].Value.ToString();
}
dt.Rows.Add(array);
//Console.WriteLine("行插入成功");
}
}
catch
(
Exception
ex)
{
Console
.WriteLine(ex.Message);
return
new
DataTable
();
}
return
dt;
}
///
<summary>
///
将DataTable的内容写入到XML文件中
///
</summary>
///
<param name="dt">
数据源
</param>
///
<param name="address">
XML文件地址
</param>
public
static
bool
WriteToXml(
DataTable
dt,
string
address)
{
try
{
//如果文件DataTable.xml存在则直接删除
if
(
File
.Exists(address))
{
File
.Delete(address);
}
XmlTextWriter
writer =
new
XmlTextWriter
(address,
Encoding
.GetEncoding(
"GBK"
));
writer.Formatting =
Formatting
.Indented;
//XML文档创建开始
writer.WriteStartDocument();
writer.WriteComment(
"DataTable: "
+ dt.TableName);
writer.WriteStartElement(
"DataTable"
);
//DataTable开始
writer.WriteAttributeString(
"TableName"
, dt.TableName);
writer.WriteAttributeString(
"CountOfRows"
, dt.Rows.Count.ToString());
writer.WriteAttributeString(
"CountOfColumns"
, dt.Columns.Count.ToString());
writer.WriteStartElement(
"ClomunName"
,
""
);
//ColumnName开始
for
(
int
i = 0; i < dt.Columns.Count; i++)
{
writer.WriteAttributeString(
"Column"
+ i.ToString(), dt.Columns[i].ColumnName);
}
writer.WriteEndElement();
//ColumnName结束
//按行各行
for
(
int
j = 0; j < dt.Rows.Count; j++)
{
writer.WriteStartElement(
"Row"
+ j.ToString(),
""
);
//打印各列
for
(
int
k = 0; k < dt.Columns.Count; k++)
{
writer.WriteAttributeString(
"Column"
+ k.ToString(), dt.Rows[j][k].ToString());
}
writer.WriteEndElement();
}
writer.WriteEndElement();
//DataTable结束
writer.WriteEndDocument();
writer.Close();
//XML文档创建结束
}
catch
(
Exception
ex)
{
Console
.WriteLine(ex.Message);
return
false
;
}
return
true
;
}