ArcEngine Domain 总结

基础知识

属性域基础知识
属性域工具箱

ArcEngine操作

常用接口

IDomain、ICodedValueDomain、ICodedValueDomain2、IRangeDomain

创建编码域（coded value domains）

//将Workspace对象转换到IworkspaceDomains接口
IWorkspaceDomains workspaceDomains = (IWorkspaceDomains)workspace;
// 创建编码域
ICodedValueDomain codedValueDomain = new CodedValueDomainClass();
// 添加编码
codedValueDomain.AddCode("RES", "Residential");
codedValueDomain.AddCode("COM", "Commercial");
codedValueDomain.AddCode("IND", "Industrial");
codedValueDomain.AddCode("BLD", "Building");
// 移除编码
codedValueDomain.DeleteCode("BLD"); // The "Building" code is removed.
// 将ICodedValueDomain对象转换到IDomain对象上，设置通用属性
IDomain domain = (IDomain)codedValueDomain;
domain.Name = "Building Types";
domain.FieldType = esriFieldType.esriFieldTypeString;
domain.SplitPolicy = esriSplitPolicyType.esriSPTDuplicate;
domain.MergePolicy = esriMergePolicyType.esriMPTDefaultValue;
// 添加Domain到工作空间中
workspaceDomains.AddDomain(domain);

创建范围域（range domains）

// 将Workspace对象转换到IworkspaceDomains接口
IWorkspaceDomains workspaceDomains = (IWorkspaceDomains)workspace;
// 创建范围域
IRangeDomain rangeDomain = new RangeDomainClass();
rangeDomain.MinValue = 0;//设置最小值
rangeDomain.MaxValue = 255;//设置最大值
//将IRangeDomain对象转换到IDomain对象上，设置通用属性
IDomain domain = (IDomain)rangeDomain;
domain.Name = "EightBitUnsignedInt";//设置Domain名称
domain.FieldType = esriFieldType.esriFieldTypeInteger;//设置Domain的字段类型
domain.SplitPolicy = esriSplitPolicyType.esriSPTDuplicate;//设置Domain的分割策略
domain.MergePolicy = esriMergePolicyType.esriMPTAreaWeighted;//设置Domain的合并策略
//添加Domain到工作空间中
workspaceDomains.AddDomain(domain);

打开值域

IWorkspaceDomains workspaceDomains = (IWorkspaceDomains)workspace;
IDomain requestedDomain = workspaceDomains.get_DomainByName(domainName);

删除值域

IWorkspaceDomains workspaceDomains = (IWorkspaceDomains)workspace;
workspaceDomains.DeleteDomain(domainName);

修改值域

//修改Domain的属性
......代码略
//修改完，调用AlterDmoain方法保存修改
IWorkspaceDomains2.AlterDomain(pDomain);

在字段上应用值域

// For example: domainName = "Material".
// fieldName = "CP_MATERIAL".
public void AssignDomainToField(IFeatureClass featureClass, String domainName,String fieldName)
{// Cast the feature class to IDataset to get a reference to the workspace.IDataset dataset = (IDataset)featureClass;// Get the workspace and cast it to the IWorkspaceDomains interface and get the requested domain.IWorkspace workspace = dataset.Workspace;IWorkspaceDomains workspaceDomains = (IWorkspaceDomains)workspace;IDomain domain = workspaceDomains.get_DomainByName(domainName);// Get the field to assign the domain to.IFields fields = featureClass.Fields;int fieldIndex = featureClass.FindField(fieldName);IField field = fields.get_Field(fieldIndex);// Check that the field and domain have the same field type.if (field.Type == domain.FieldType)    {// Cast the feature class to the ISchemaLock and IClassSchemaEdit interfaces.ISchemaLock schemaLock = (ISchemaLock)featureClass;IClassSchemaEdit classSchemaEdit = (IClassSchemaEdit)featureClass;// Attempt to get an exclusive schema lock.        try        {// Lock the class and alter the domain.schemaLock.ChangeSchemaLock(esriSchemaLock.esriExclusiveSchemaLock);classSchemaEdit.AlterDomain(fieldName, domain);Console.WriteLine("The domain was successfully assigned.");        }catch (Exception exc)        {// Handle the exception in a way appropriate for the application.Console.WriteLine(exc.Message);        }finally{// Set the schema lock to be a shared lock.schemaLock.ChangeSchemaLock(esriSchemaLock.esriSharedSchemaLock);}}else{Console.WriteLine("The field and the domain have different field types: " + "Field = {0}, Domain = {1}", field.Type, domain.FieldType);    }
}

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ArcEngine Domain 总结

基础知识

ArcEngine操作

常用接口

创建编码域（coded value domains）

创建范围域（range domains）

打开值域

删除值域

修改值域

在字段上应用值域

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