我正在VS2012 C＃中创建ESRI ArcMap 10.2扩展。我一直遇到一个问题，当我创建一个包含大量列的shapefile时，我得到错误：
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
在功能工作区上实际运行“创建要素”方法时。以下是代码摘录：
public bool LoadData(DataQueryResult QueryResult, string ColumnX, string ColumnY)
{
bool loaded = true;
DataTable Data = QueryResult.ResultsTable;
try
{
using (ESRI.ArcGIS.ADF.ComReleaser ComReleaser = new ESRI.ArcGIS.ADF.ComReleaser())
{
//Create the field collection for editing
IFields Fields = new FieldsClass();
ComReleaser.ManageLifetime(Fields);
IFieldsEdit FieldsEdit = (IFieldsEdit)Fields;
//Create the geometry field
IGeometryDef GeomDef = new GeometryDef();
IGeometryDefEdit GeomDefEdit = (IGeometryDefEdit)GeomDef;
GeomDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;
IField GeomField = new FieldClass();
IFieldEdit GeomFieldEdit = (IFieldEdit)GeomField;
GeomFieldEdit.Name_2 = ShapeFieldName;
GeomFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
GeomFieldEdit.GeometryDef_2 = GeomDef;
GeomDefEdit.SpatialReference_2 = new UnknownCoordinateSystemClass();;
FieldsEdit.AddField(GeomField);
//Create the OID filed
IField OidField = new FieldClass();
IFieldEdit OidFieldEdit = (IFieldEdit)OidField;
OidFieldEdit.Name_2 = "OID";
OidFieldEdit.Type_2 = esriFieldType.esriFieldTypeOID;
FieldsEdit.AddField(OidField);
//Add a field for each column
foreach (DataColumn col in Data.Columns)
{
IField2 field = new FieldClass();
IFieldEdit fieldedit = (IFieldEdit)field;
fieldedit.Name_2 = col.ColumnName;
bool AddField = false;
if (col.DataType.IsIn(typeof(Int64), typeof(Int32)))
{
//Best we can do is 32 bit in a shapefile
fieldedit.Type_2 = esriFieldType.esriFieldTypeInteger;
AddField = true;
}
else if (col.DataType == typeof(Int16))
{
fieldedit.Type_2 = esriFieldType.esriFieldTypeSmallInteger;
AddField = true;
}
else if (col.DataType == typeof(Single))
{
fieldedit.Type_2 = esriFieldType.esriFieldTypeSingle;
AddField = true;
}
else if (col.DataType == typeof(double))
{
fieldedit.Type_2 = esriFieldType.esriFieldTypeDouble;
AddField = true;
}
else if (col.DataType == typeof(string))
{
fieldedit.Type_2 = esriFieldType.esriFieldTypeString;
//Here is where I get "Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
//The higher the number of fields the fewer "runs" of this method needed to hit the error.
//At 150 it is hit right away but if it is at, say, 50 it can run many times.
if (Fields.FieldCount < 150)
AddField = true;
else
System.Diagnostics.Debug.Write(field.Name + "; ");
}
else if (col.DataType == typeof(DateTime))
{
fieldedit.Type_2 = esriFieldType.esriFieldTypeDate;
AddField = true;
}
else if (col.DataType == typeof(bool))
{
fieldedit.Type_2 = esriFieldType.esriFieldTypeString;
AddField = true;
}
if (AddField)
FieldsEdit.AddField(field);
}
//FilePath is the ArcMap temp folder generated for the session so something like "C:\Users\USERNAME\AppData\Local\Temp\arc1097\\"
IWorkspaceFactory WorkspaceFactory = new ShapefileWorkspaceFactoryClass();
IFeatureWorkspace FeatureWorkspace = (IFeatureWorkspace)WorkspaceFactory.OpenFromFile(FilePath, hWnd);
ComReleaser.ManageLifetime(WorkspaceFactory);
//FileName is a class memeber which might be something like "o2zkdrnv.shp" which is randomly generated
FeatureClass = FeatureWorkspace.CreateFeatureClass(FileName, Fields, null, null, esriFeatureType.esriFTSimple, ShapeFieldName, ""); //<-- THE ERROR OCCURS HERE
ComReleaser.ManageLifetime(FeatureClass);
}
}
}
所以我只能假设它是某种内存错误。我允许的列越多（“＆lt; 150”这一行），在遇到错误之前我可以重复运行的次数很少。似乎65左右是我立即开始看到它的门槛。在那之下，我可以运行它，比如，在击中它之前5-6次，但这似乎非常不一致。如果我停止调试VS并重新启动项目，似乎很快就会发生。我添加了ComReleaser认为它可能会有所帮助（甚至认为它在技术上不是ArcMap命名空间的一部分）但它没有任何区别。
传递的数据表包含以下字段列表：
RecordID,SiteID,SiteName,SiteType,LocID,LocName,LocType,LocX,LocY,LocZ,LocLong,LocLat,LocTop,LocBot,LocGroup,SampID,SampName,SampDate,SampDate2,SampTime,SampTime2,SampType,SampGroup,SampMatrix,SampTop,cSampTop,SampBot,cSampBot,SampElev,cSampElev,SampUnit,AnalyteID,Analyte,Result,cResult,Flag,Unit,DetectLim,cDetectLim,IsDetect,IsTIC,IsReject,Method,Category,LabID,Comment,Source,RegName01,RegValue01,RegAbove01,RegName02,RegValue02,RegAbove02,RegName03,RegValue03,RegAbove03,RegName04,RegValue04,RegAbove04,RegName05,RegValue05,RegAbove05,RegName06,RegValue06,RegAbove06,RegName07,RegValue07,RegAbove07,RegName08,RegValue08,RegAbove08,RegName09,RegValue09,RegAbove09,RegName10,RegValue10,RegAbove10,RegName11,RegValue11,RegAbove11,RegName12,RegValue12,RegAbove12,RegName13,RegValue13,RegAbove13,RegName14,RegValue14,RegAbove14,RegName15,RegValue15,RegAbove15,RegName16,RegValue16,RegAbove16,RegName17,RegValue17,RegAbove17,RegName18,RegValue18,RegAbove18,RegName19,RegValue19,RegAbove19,RegName20,RegValue20,RegAbove20,RegName21,RegValue21,RegAbove21,RegName22,RegValue22,RegAbove22,RegName23,RegValue23,RegAbove23,RegName24,RegValue24,RegAbove24,RegName25,RegValue25,RegAbove25,RegName26,RegValue26,RegAbove26,RegName27,RegValue27,RegAbove27,RegName28,RegValue28,RegAbove28,RegName29,RegValue29,RegAbove29,RegName30,RegValue30,RegAbove30
理论上，表的内容应该无关紧要，因为此方法从中获取的唯一内容是Columns集合。
非常感谢任何帮助。