allow me first introduce classes using:
public class assessment { public list<normdefinition> definitions {get;set;} public list<parameter> parameters {get;set;} } public class normdefinition { public string columnname {get;set;} } public class parameter { public string name {get;set;} public list<normvalue> norms {get;set;} } public class normvalue { public normdefinition definition {get;set;} public string value {get;set;} } the user navigating through sort of wizard , has complete tasks create assessment.
the first step defining 1 or more normdefinitions. has more settings shown above others irrelevant problem.
the second step define 1 or more parameters. however, user can add values defined normdefinitions. trying creating datagrid itemssource = {binding assessment.parameters}, know source each binding parameter object bound row.
when second screen gets focus, code adds column each normdefinition user might fill in value. creation of columns looks this:
private void createnormdefinitioncolumns() { foreach (var definition in assessment.definitions) { datagridtextcolumn column = new datagridtextcolumn(); column.header = definition.columnname; column.binding = new binding() { // add binding to: // parameter.norms.single(norm => norm.definition == definition).value; } parameterdatagrid.columns.add(column); } } please me solution set binding.
to take 1 step further, in case .single() not return result, normvalue object created , added parameter.
for such case use genericrow , generictable classes:
public class genericrow : customtypedescriptor, inotifypropertychanged { #region private fields list<propertydescriptor> _property_list = new list<propertydescriptor>(); #endregion #region inotifypropertychange implementation public event propertychangedeventhandler propertychanged = delegate { }; protected void onpropertychanged(string propertyname) { propertychanged(this, new propertychangedeventargs(propertyname)); } #endregion inotifypropertychange implementation #region public methods public void setpropertyvalue<t>(string propertyname, t propertyvalue) { var properties = this.getproperties() .cast<propertydescriptor>() .where(prop => prop.name.equals(propertyname)); if (properties == null || properties.count() != 1) { throw new exception("the property doesn't exist."); } var property = properties.first(); property.setvalue(this, propertyvalue); onpropertychanged(propertyname); } public t getpropertyvalue<t>(string propertyname) { var properties = this.getproperties() .cast<propertydescriptor>() .where(prop => prop.name.equals(propertyname)); if (properties == null || properties.count() != 1) { throw new exception("the property doesn't exist."); } var property = properties.first(); return (t)property.getvalue(this); } public void addproperty<t, u>(string propertyname) u : genericrow { var customproperty = new custompropertydescriptor<t>( propertyname, typeof(u)); _property_list.add(customproperty); } #endregion #region overriden methods public override propertydescriptorcollection getproperties() { var properties = base.getproperties(); return new propertydescriptorcollection( properties.cast<propertydescriptor>() .concat(_property_list).toarray()); } #endregion } and:
public class generictable { private string tablename = ""; public string tablename { { return tablename; } set { tablename = value; } } private observablecollection<datagridcolumn> columncollection; public observablecollection<datagridcolumn> columncollection { { return columncollection; } private set { columncollection = value; } } private observablecollection<genericrow> genericrowcollection; public observablecollection<genericrow> genericrowcollection { { return genericrowcollection; } set { genericrowcollection = value; } } public generictable(string tablename) { this.tablename = tablename; columncollection = new observablecollection<datagridcolumn>(); genericrowcollection = new observablecollection<genericrow>(); } /// <summary> /// columnname binding property name /// </summary> /// <param name="columnname"></param> public void addcolumn(string columnname) { datagridtextcolumn column = new datagridtextcolumn(); column.header = columnname; column.binding = new binding(columnname); columncollection.add(column); } public override string tostring() { return tablename; } } 
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