/// <summary>
/// Populates a <see cref="T:System.Runtime.Serialization.SerializationInfo" /> with the data needed to serialize the
/// target object.
/// </summary>
/// <param name="info">The <see cref="T:System.Runtime.Serialization.SerializationInfo" /> to populate with data.</param>
/// <param name="context">
/// The destination (see <see cref="T:System.Runtime.Serialization.StreamingContext" />) for this
/// serialization.
/// </param>
public void GetObjectData(SerializationInfo info, StreamingContext context)
{
using (ComReleaser cr = new ComReleaser())
{
IPersistStream persist = this.Value as IPersistStream;
if (persist == null)
{
return;
}
IObjectStream stream = new ObjectStreamClass();
cr.ManageLifetime(stream);
IMemoryBlobStream blob = new MemoryBlobStreamClass();
cr.ManageLifetime(blob);
stream.Stream = blob;
persist.Save(stream, 0);
IMemoryBlobStreamVariant variant = (IMemoryBlobStreamVariant)blob;
object value;
variant.ExportToVariant(out value);
var data = (byte[])value;
info.AddValue("DATA", data);
info.AddValue("PROGID", this.ProgId);
}
}
//从数据库中读取MXD文档
private byte[] ReadByteFromBlob(string TableName, string QuerStr, string fieldName)
{
ICursor pCursor = null;
byte[] newbyte = null;
try
{
ITable pTable = (m_pWorkspace as IFeatureWorkspace).OpenTable(TableName);
IQueryFilter pQueryFilter = new QueryFilterClass();
pQueryFilter.WhereClause = QuerStr;
pQueryFilter.SubFields = fieldName;
pCursor = pTable.Search(pQueryFilter, false);
if (pCursor == null)
{
return(null);
}
int FieldIndex = pCursor.Fields.FindField(fieldName);
if (FieldIndex < 0)
{
return(null);
}
IRow pRow = pCursor.NextRow();
if (pRow == null)
{
return(null);
}
object resultValue = pRow.get_Value(FieldIndex);
if (resultValue == null)
{
return(null);
}
if (resultValue is System.DBNull)
{
return(null);
}
IMemoryBlobStreamVariant pMemoryBlob = resultValue as IMemoryBlobStreamVariant;
object outValue;
pMemoryBlob.ExportToVariant(out outValue);
newbyte = (byte[])outValue;
}
catch
{
return(null);
}
return(newbyte);
}
public void SymbolFeatrueLayer(IFeatureLayer pFealyr)
{
if (!(pFealyr is IGeoFeatureLayer))
{
return;
}
try
{
string strXMLpath = System.Windows.Forms.Application.StartupPath + "\\..\\Template\\SymbolInfo.xml";
string strLyrName = pFealyr.Name;
if (pFealyr.FeatureClass != null)
{
IDataset pDataset = pFealyr.FeatureClass as IDataset;
strLyrName = pDataset.Name;
}
strLyrName = strLyrName.Substring(strLyrName.IndexOf('.') + 1);
if (m_vDoc == null)
{
IFeatureWorkspace pFeaWks = ModFrameData.m_pFeatureWorkspace;
ITable pTable = pFeaWks.OpenTable("SYMBOLINFO");
IQueryFilter pQueryFilter = new ESRI.ArcGIS.Geodatabase.QueryFilterClass();
pQueryFilter.WhereClause = "SYMBOLNAME='ALLSYMBOL'";
ICursor pCursor = pTable.Search(pQueryFilter, false);
IRow pRow = pCursor.NextRow();
if (pRow == null)
{
return;
}
IMemoryBlobStreamVariant var = pRow.get_Value(pRow.Fields.FindField("SYMBOL")) as IMemoryBlobStreamVariant;
object tempObj = null;
if (var == null)
{
return;
}
var.ExportToVariant(out tempObj);
XmlDocument doc = new XmlDocument();
byte[] btyes = (byte[])tempObj;
string xml = Encoding.Default.GetString(btyes);
doc.LoadXml(xml);
DateTime updateTime = (DateTime)pRow.get_Value(pRow.Fields.FindField("UPDATETIME"));
DateTime Nowtime;
bool blnUpdate = false;
//读一个日志算了
string strTimeLog = System.Windows.Forms.Application.StartupPath + "\\..\\Template\\UpdateTime.txt";
if (System.IO.File.Exists(strTimeLog))
{
StreamReader sr = new StreamReader(strTimeLog);
string strTime = sr.ReadLine();
sr.Close();
if (!DateTime.TryParse(strTime, out Nowtime))
{
blnUpdate = true;
}
if (updateTime > Nowtime)
{
if (SysCommon.Error.ErrorHandle.ShowFrmInformation("是", "否", "存在最新符号信息，是否需要下载？"))
{
blnUpdate = true;
}
}
}
else
{
blnUpdate = true;
}
System.Runtime.InteropServices.Marshal.ReleaseComObject(pCursor);
pCursor = null;
//首先判断是否需要下载符号信息
if (System.IO.File.Exists(strXMLpath))
{
if (blnUpdate)
{
doc.Save(strXMLpath);
StreamWriter sw1 = new StreamWriter(strTimeLog);
sw1.Write(updateTime.ToString());
sw1.Close();
}
}
else
{
doc.Save(strXMLpath);
StreamWriter sw = new StreamWriter(strTimeLog);
sw.Write(updateTime.ToString());
sw.Close();
}
m_vDoc = new XmlDocument();
m_vDoc.Load(strXMLpath);
}
else
{
}
XmlElement pElement = m_vDoc.SelectSingleNode("//" + strLyrName) as XmlElement;
if (pElement == null)
{
return;
}
IFeatureRenderer pFeaRender = SysCommon.XML.XMLClass.XmlDeSerializer2(pElement.FirstChild.Value) as IFeatureRenderer;
IGeoFeatureLayer pGeoLyr = pFealyr as IGeoFeatureLayer;
pGeoLyr.Renderer = pFeaRender;
}
catch
{
}
}