| Article | 41017036 |
| Type | HowTo |
| Product | Engine |
| Version | 4.0.0.1017 |
| Date Added | 3/20/2003 |
| Submitted by | Bryan Kim |
| Keywords |
The C# code below is a sample code that produces error(s) in .NET enviroment.
private void buttonTest_Click(object sender, System.EventArgs e)
{
int count = 50;
int countItem = 100;
//1st new
axVDPro.ActiveDocument.New(); // or after .Open
VDProLib.vdLine vdLine = null;
for(int i = 0; i < count ; i++)
{
bool check = axVDPro.ActiveDocument.New(); // or after .Open
for (int k = 0; k < countItem; k++)
{
vdLine = axVDPro.ActiveDocument.Entities.AddLine(
new object[] {100*k,0,0} , new object[] {100*k,1000,0} ) ;
}
}
axVDPro.CommandAction.Zoom("E",0,0);
}
} |
The reason is that .New and .Open methods inside loops release the old references and create new in Entities, Blocks, Layers,
TextStyles, DimStyles and Selections collections and in Model object.
So when you call some of the above, you have to declare it in the start of the code and you have to update its value after the
.New or .Open methods.
The above code should be like : private void buttonTest_Click(object sender, System.EventArgs e)
{
int count = 50;
int countItem = 100;
VDProLib.vdEntities ents;
ents = axVDPro.ActiveDocument.Entities;
//1st new
axVDPro.ActiveDocument.New();
ents = axVDPro.ActiveDocument.Entities;
VDProLib.vdLine vdLine = null;
for(int i = 0; i < count ; i++)
{
bool check = axVDPro.ActiveDocument.New();
ents = axVDPro.ActiveDocument.Entities;
for (int k = 0; k < countItem; k++)
{
vdLine = ents.AddLine( new object[] {100*k,0,0} ,
new object[] {100*k,1000,0} ) ;
}
}
axVDPro.CommandAction.Zoom("E",0,0);
}This solution is the same for Standard component. In that case the VDProLib should be replaced by VDStdLib. |