/// <summary>
/// Each BuilderItem contains a Function Raster Dataset which is used to create the thumbnail.
/// The thumbnail is created by Nearest Neighbor resampling of the Function Raster Dataset.
/// The resampled raster is exported as a byte array and saved Into the IMemoryBlobStreamVariant.
/// The blob is then inserted into the Thumbnail field.
/// </summary>
/// <param name="mybuilderItem">Item containing the Function Dataset to be added to the Mosaic Dataset</param>
private void Resampling(IBuilderItem mybuilderItem)
{
try
{
IFunctionRasterDataset pFuncRasterDataset = mybuilderItem.Dataset; // Get the FunctionRasterDataset from mybuilderItem
IRasterDataset pRasterDataset;
pRasterDataset = (IRasterDataset)pFuncRasterDataset; // Cast the FunctionRasterDataset to Raster Dataset
IPropertySet thePropSet = pFuncRasterDataset.Properties; // Get the properties of the raster Dataset
IRaster praster = pRasterDataset.CreateDefaultRaster(); // Create default raster from the above raster dataset
praster.ResampleMethod = rstResamplingTypes.RSP_NearestNeighbor; // The raster is resampled by RSP_NearestNeighbor
IRasterProps pRasterProps = (IRasterProps)praster; // Raster properties are used to update the height, width of the raster
pRasterProps.Height = 256;
pRasterProps.Width = 256;
IRasterExporter pConverter = new RasterExporterClass(); // IRasterExporter object is used to convert the raster to byte array.
byte[] pBytesArr;
pBytesArr = pConverter.ExportToBytes(praster, "TIFF"); // Convert the resampled Raster to a Byte array
IMemoryBlobStream memBlobStream = new MemoryBlobStream(); // Create new IMemoryBlobStream
IMemoryBlobStreamVariant varBlobStream = (IMemoryBlobStreamVariant)memBlobStream; // Assign to IMemoryBlobStreamVariant
object anObject = pBytesArr;
varBlobStream.ImportFromVariant(anObject); // IMemoryBlobStreamVariant object is assigned the byte array
thePropSet.SetProperty("ThumbNail", memBlobStream); // and saved to the property "ThumbNail"
}
catch (Exception ex)
{
System.Exception myExc = new System.Exception(
"Error: Failed to Re-Sampled the raster.Thumbnails will not be created." + ex.Message, ex);
throw myExc;
}
return;
}
//从数据库向本地拷贝
private void CopyEagleEyeMap(IWorkspace pWorkspace, string strPath)
{
Exception eError = null;
//读取数据库表内容
object tempObj = GetFieldValue("SYSSETTING", "SETTINGVALUE2", "SETTINGNAME='鹰眼图'", pWorkspace, out eError);
IMemoryBlobStreamVariant pMemoryBlobStreamVariant = tempObj as IMemoryBlobStreamVariant;
IMemoryBlobStream pMemoryBlobStream = pMemoryBlobStreamVariant as IMemoryBlobStream;
if (pMemoryBlobStream != null)
{
pMemoryBlobStream.SaveToFile(strPath);
}
}
//当初当前系统参数的值，放在指定路径（限定该参数值是BLOB类型，并且存入时是选取文件存入的）
private void buttonXExport_Click(object sender, EventArgs e)
{
if (!comboBoxDataType.Text.Contains("File"))
{
return;
}
SaveFileDialog pOpenFileDlg = new SaveFileDialog();
pOpenFileDlg.Title = "选择文件";
switch (comboBoxDataType.Text)
{
case "XmlFile":
//弹出对话框供用户设置导出的xml文件
pOpenFileDlg.Filter = "XML数据(*.xml)|*.xml";
break;
case "MxdFile":
pOpenFileDlg.Filter = "mxd文件(*.mxd)|*.mxd";
break;
}
if (pOpenFileDlg.ShowDialog() == DialogResult.OK)
{ //获得系统参数表的BLOB字段值，并导出到指定文件中
string strPath = pOpenFileDlg.FileName;
SysGisTable mSystable = new SysCommon.Gis.SysGisTable(_TmpWorkSpace);
Exception err = null;
Dictionary <string, object> pDic = mSystable.GetRow("SYSSETTING", "SETTINGNAME='" + this.textBoxSettingName.Text + "'", out err);
if (pDic != null)
{
if (pDic.ContainsKey("SETTINGVALUE2"))
{
if (pDic["SETTINGVALUE2"] != null) //这里仅能成功导出当初以文件类型导入的BLOB字段
{
object tempObj = pDic["SETTINGVALUE2"];
IMemoryBlobStreamVariant pMemoryBlobStreamVariant = tempObj as IMemoryBlobStreamVariant;
IMemoryBlobStream pMemoryBlobStream = pMemoryBlobStreamVariant as IMemoryBlobStream;
if (pMemoryBlobStream != null)
{
pMemoryBlobStream.SaveToFile(strPath);
MessageBox.Show("将文件" + strPath + "导出成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);//ygc 2012-12-17 新增提示信息
}
}
}
}
mSystable = null;
}
}
//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 static bool CopySysSettingtoFile(IWorkspace pWorkspace, string strSettingName, string strPath)
{
Exception eError = null;
if (pWorkspace != null)
{
try
{
//读取数据库表内容
Fan.Common.Gis.SysGisTable sysTable = new Fan.Common.Gis.SysGisTable(pWorkspace);
Exception err = null;
Dictionary <string, object> pDic = sysTable.GetRow("SYSSETTING", "SETTINGNAME='" + strSettingName + "'", out err);
if (pDic != null)
{
if (pDic.ContainsKey("SETTINGVALUE2"))
{
if (pDic["SETTINGVALUE2"] != null) //这里仅能成功导出当初以文件类型导入的BLOB字段
{
object tempObj = pDic["SETTINGVALUE2"];
IMemoryBlobStreamVariant pMemoryBlobStreamVariant = tempObj as IMemoryBlobStreamVariant;
IMemoryBlobStream pMemoryBlobStream = pMemoryBlobStreamVariant as IMemoryBlobStream;
if (pMemoryBlobStream != null)
{
pMemoryBlobStream.SaveToFile(strPath);
}
sysTable = null;
return(true);
}
}
}
sysTable = null;
}
catch (Exception err)
{}
}
return(false);
}
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
{
}
}