I get this message in "Spaltenbreite definieren" => Definition for Columns
Width
An unhandled exception of type 'System.NullReferenceException' occurred in
WindowsApplication1.exe
Additional information: Object reference not set to an instance of an
object.
Please help me.
Thanks
Michael
CODE:
=====
private void CreateMyDatagrid()
{
// MyDatagrid erstellen
DataGrid MyDataGrid = new DataGrid();
MyDataGrid.Bounds = new Rectangle(new Point(10,10), new Size(650,350));
// Datagrid Eigenschaften
MyDataGrid.CaptionText="Berechtigung -> ALLE = A+B+E+L / A=Ansehen /
B=Bearbeiten / E = Erstellen / L=Löschen";
MyDataGrid.ReadOnly = false;
// Dataset erstellen
DataSet MyDataSet = new DataSet();
DataGridTableStyle myTableStyle = new DataGridTableStyle();
myTableStyle.MappingName = "MappingName_ts_berechtigung"; // ts=tablestyle
DataGridBoolColumn boolCol = new DataGridBoolColumn();
boolCol.MappingName="MappingName_dgbc_berechtigung ";
//dgbc=datagridboolcolumn
((DataGridBoolColumn)boolCol).AllowNull = false;
myTableStyle.GridColumnStyles.Add(boolCol);
//MyDataGrid.TableStyles.Clear();
// DataTable erstellen
DataTable dt = new DataTable("DataTable_Berechtigung");
// Spalten erstellen
dt.Columns.Add("Modul", typeof(string)).ReadOnly = true;
dt.Columns.Add("Zusatz...", typeof(string)).ReadOnly = true;
dt.Columns.Add("ALLE", typeof(bool));
dt.Columns.Add("A", typeof(bool));
dt.Columns.Add("B", typeof(bool));
dt.Columns.Add("E", typeof(bool));
dt.Columns.Add("L", typeof(bool));
//Spaltenbreite definieren
myTableStyle.GridColumnStyles["Modul"].Width=20;
myTableStyle.GridColumnStyles["Zusatz..."].Width=50;
myTableStyle.GridColumnStyles["ALLE"].Width=60;
//MyDataGrid.TableStyles["DataTable_Berechtigung"].GridColumnStyles[0].Width
=0;
//MyDataGrid.TableStyles["DataTable_Berechtigung"].GridColumnStyles[1].Width
=80;
//MyDataGrid.TableStyles["DataTable_Berechtigung"].GridColumnStyles[2].Width
=80;
//MyDataGrid.TableStyles["DataTable_Berechtigung"].GridColumnStyles[3].Width
=20;
// Zeilen erstellen und inhalt abfüllen
// checkbox in variable
int test = 1;
dt.Rows.Add(new Object[] {"Adresse", "ev. sonst noch was",0,test,0,0,0});
dt.Rows.Add(new Object[] {"Depositen", "ev. sonst noch was",1,1,1,1,1});
dt.Rows.Add(new Object[] {"Obligation", "ev. sonst noch was",0,0,0,0,0});
dt.Rows.Add(new Object[] {"Miete", "ev. sonst noch was",1,1,1,1,1});
dt.Rows.Add(new Object[] {"Stammdaten", "ev. sonst noch was",0,0,0,0,0});
// DataTable in dataset
MyDataSet.Tables.Add(dt);
// Dataset in datagrid
MyDataGrid.SetDataBinding(MyDataSet,"DataTable_Ber echtigung");
// Tablestyle dem Datagrid hinzufügen
MyDataGrid.TableStyles.Add(myTableStyle);
// Anzeigen des Datagrids
this.Controls.Add(MyDataGrid);
}
