ChildRelationCount Property (DefaultSheetDataModel)

Gets the number of the child data relations for a hierarchical display of data.

Syntax

Visual Basic
C#

'Declaration
 
Public ReadOnly Property ChildRelationCount As Integer

'Usage
 
Dim instance As DefaultSheetDataModel
Dim value As Integer
 
value = instance.ChildRelationCount

public int ChildRelationCount {get;}

Property Value

Integer number of child relations

Example

This example creates a DefaultSheetDataModel and assigns it to the DataModel of the spreadsheet. The data source of the model is attached to some DataTables and the ParentRelationName and ParentRowIndex are returned to a list box.

Visual Basic

Private Sub Page_Load(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles MyBase.Load

If(IsPostBack)Then Return

Dim ds As New System.Data.DataSet()
Dim dm As New FarPoint.Web.Spread.Model.DefaultSheetDataModel()
FpSpread1.ActiveSheetView.DataModel=dm
FpSpread1.HierarchicalView=True

Dim emp As DataTable=New DataTable("Employee")
Dim dept As DataTable=New DataTable("Department")

Dim lname As DataColumn = New DataColumn("LastName",GetType(System.String))
Dim fname As DataColumn = New DataColumn("FirstName",GetType(System.String))

Dim dname As DataColumn = New DataColumn("DeptName",GetType(System.String))
Dim area As DataColumn = New DataColumn("Area",GetType(System.String))

Dim id As DataColumn = emp.Columns.Add("ID",GetType(System.Int32))
id.AutoIncrement=True
Dim primarykey As DataColumn() = New DataColumn(){id}
emp.PrimaryKey=primarykey
emp.Columns.Add(lname)
emp.Columns.Add(fname)

id=dept.Columns.Add("ID",GetType(System.Int32))
id.AutoIncrement=True
dept.PrimaryKey = New DataColumn(){id}
id.AutoIncrement=True
Dim lang As DataColumn = dept.Columns.Add("Language",GetType(System.Int32))
Dim foreignkey As DataColumn() = New DataColumn(){lang}
dept.Columns.Add(dname)
dept.Columns.Add(area)

ds.Tables.Add(emp)
ds.Tables.Add(dept)

Dim ti As DataRow=emp.NewRow()
ti(lname)="Bazemoreland"
ti(fname)="Ti"
emp.Rows.Add(ti)

Dim ginny As DataRow=emp.NewRow()
ginny(lname)="Danielson"
ginny(fname)="Ginny"
emp.Rows.Add(ginny)

Dim bob As DataRow=emp.NewRow()
bob(lname)="Morrison"
bob(fname)="Bob"
emp.Rows.Add(bob)

Dim rel As DataRelation= New DataRelation("FarPoint",primarykey,foreignkey,False)
ds.Relations.Add(rel)

Dim row As DataRow=dept.NewRow()
row("Language")=ti("ID")
row(dname)="TechSupport"
row(area)="C#"
dept.Rows.Add(row)

row=dept.NewRow()
row("Language")=ginny("ID")
row(dname)="TechSupport"
row(area)="VB.Net"
dept.Rows.Add(row)
row=dept.NewRow()
row("Language")=bob("ID")
row(dname)="TechSupport"
row(area)="C#"
dept.Rows.Add(row)
ds.AcceptChanges()
dm.DataSource=ds
dm.DataMember="Employee"

Dim dm2 As FarPoint.Web.Spread.Model.DefaultSheetDataModel
dm2=FpSpread1.Sheets(0).GetChildView(0,0).DataModel
ListBox1.Items.Add(dm2.ParentRelationName)
ListBox1.Items.Add(dm2.ParentRowIndex)
ListBox1.Items.Add(dm.ChildRelationCount)
End Sub

private void Page_Load(object sender,System.EventArgs e)
{
System.Data.DataSet ds = new System.Data.DataSet();
FarPoint.Web.Spread.Model.DefaultSheetDataModel dm;
dm = new FarPoint.Web.Spread.Model.DefaultSheetDataModel();
FpSpread1.ActiveSheetView.DataModel = dm;
FpSpread1.HierarchicalView=true;
DataTable emp = new DataTable("Employee");
DataTable dept = new DataTable("Department");

DataColumn lname = new DataColumn("LastName",typeof(String));
DataColumn fname = new DataColumn("FirstName",typeof(String));

DataColumn dname = new DataColumn("DeptName",typeof(String));
DataColumn area = new DataColumn("Area",typeof(String));

DataColumn id = emp.Columns.Add("ID",typeof(Int32));
id.AutoIncrement=true;
emp.PrimaryKey=new DataColumn[]{id};
emp.Columns.Add(lname);
emp.Columns.Add(fname);

id=dept.Columns.Add("ID",typeof(Int32));
id.AutoIncrement=true;
dept.PrimaryKey=new DataColumn[]{id};
id.AutoIncrement=true;
DataColumnlang=dept.Columns.Add("Language",typeof(Int32));
DataColumn[]foreignkey=new DataColumn[]{lang};
dept.Columns.Add(dname);
dept.Columns.Add(area);

ds.Tables.Add(emp);
ds.Tables.Add(dept);

DataRow ti=emp.NewRow();
ti[lname]="Bazemoreland";
ti[fname]="Ti";
emp.Rows.Add(ti);

DataRow ginny=emp.NewRow();
ginny[lname]="Danielson";
ginny[fname]="Ginny";
emp.Rows.Add(ginny);

DataRow bob=emp.NewRow();
bob[lname]="Morrison";
bob[fname]="Bob";
emp.Rows.Add(bob);

DataRelation rel = new DataRelation("FarPoint",emp.PrimaryKey,foreignkey,false);
ds.Relations.Add(rel);

DataRow row=dept.NewRow();
row["Language"]=ti["ID"];
row[dname]="TechSupport";
row[area]="C#";
dept.Rows.Add(row);

row=dept.NewRow();
row["Language"]=ginny["ID"];
row[dname]="TechSupport";
row[area]="VB.Net";
dept.Rows.Add(row);
row=dept.NewRow();
row["Language"]=bob["ID"];
row[dname]="TechSupport";
row[area]="C#";
dept.Rows.Add(row);
ds.AcceptChanges();
dm.DataSource=ds;
dm.DataMember="Employee";
FarPoint.Web.Spread.Model.DefaultSheetDataModel dm2;
dm2=(FarPoint.Web.Spread.Model.DefaultSheetDataModel)FpSpread1.Sheets[0].GetChildView(0,0).DataModel;
ListBox1.Items.Add(dm2.ParentRelationName);
ListBox1.Items.Add(Convert.ToString(dm2.ParentRowIndex));
ListBox1.Items.Add(Convert.ToString(dm.ChildRelationCount));
}

Requirements

Target Platforms: Windows 7, Windows 8, Windows Vista, Windows Server 2000, Windows 2000 Professional, Windows XP Professional, Windows NT 4.0 Workstation, SP6, Windows NT 4.0 Server, SP6

Reference

DefaultSheetDataModel Class
DefaultSheetDataModel Members
GetChildRelation Method