将空字段从数据表写入xml文件

Question

DataSet ds = new DataSet();
string strData = "SELECT * FROM  table";
DataTable dt = Globals.RealsoftObjects.GetDataTable(strData);
dtReportTypes.TableName = "table";
ds.Tables.Add(dt);
ds.WriteXml(sd.FileName,XmlWriteMode.WriteSchema);

I had used this code for write xml file from dataset. if there is a null value in table it doesn't write on xml.

is there any solution?

for example

table have 2 fields field1 field2 and field1 is null xml writes only field2 with its value. I need field 1 also.

Answer 1

use the code to write xml

ds.WriteXml(sd.FileName,XmlWriteMode.WriteSchema);

this will read entire schema

and to convert xml to datatable

ds.ReadXml(strFileName,XmlReadMode.ReadSchema);