I get this message in "Spaltenbre ite definieren" => Definition for Columns
Width
An unhandled exception of type 'System.NullRef erenceException ' occurred in
WindowsApplicat ion1.exe
Additional information: Object reference not set to an instance of an
object.
Please help me.
Thanks
Michael
CODE:
=====
private void CreateMyDatagri d()
{
// MyDatagrid erstellen
DataGrid MyDataGrid = new DataGrid();
MyDataGrid.Boun ds = new Rectangle(new Point(10,10), new Size(650,350));
// Datagrid Eigenschaften
MyDataGrid.Capt ionText="Berech tigung -> ALLE = A+B+E+L / A=Ansehen /
B=Bearbeiten / E = Erstellen / L=Löschen";
MyDataGrid.Read Only = false;
// Dataset erstellen
DataSet MyDataSet = new DataSet();
DataGridTableSt yle myTableStyle = new DataGridTableSt yle();
myTableStyle.Ma ppingName = "MappingName_ts _berechtigung"; // ts=tablestyle
DataGridBoolCol umn boolCol = new DataGridBoolCol umn();
boolCol.Mapping Name="MappingNa me_dgbc_berecht igung";
//dgbc=datagridbo olcolumn
((DataGridBoolC olumn)boolCol). AllowNull = false;
myTableStyle.Gr idColumnStyles. Add(boolCol);
//MyDataGrid.Tabl eStyles.Clear() ;
// DataTable erstellen
DataTable dt = new DataTable("Data Table_Berechtig ung");
// 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.Gr idColumnStyles["Modul"].Width=20;
myTableStyle.Gr idColumnStyles["Zusatz..."].Width=50;
myTableStyle.Gr idColumnStyles["ALLE"].Width=60;
//MyDataGrid.Tabl eStyles["DataTable_Bere chtigung"].GridColumnStyl es[0].Width
=0;
//MyDataGrid.Tabl eStyles["DataTable_Bere chtigung"].GridColumnStyl es[1].Width
=80;
//MyDataGrid.Tabl eStyles["DataTable_Bere chtigung"].GridColumnStyl es[2].Width
=80;
//MyDataGrid.Tabl eStyles["DataTable_Bere chtigung"].GridColumnStyl es[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.Table s.Add(dt);
// Dataset in datagrid
MyDataGrid.SetD ataBinding(MyDa taSet,"DataTabl e_Berechtigung" );
// Tablestyle dem Datagrid hinzufügen
MyDataGrid.Tabl eStyles.Add(myT ableStyle);
// Anzeigen des Datagrids
this.Controls.A dd(MyDataGrid);
} 4 5974
"michael walser" <mi************ @bingo.de> wrote in
news:eZ******** *****@TK2MSFTNG P12.phx.gbl: I get this message in "Spaltenbre ite definieren" => Definition for Columns Width
An unhandled exception of type 'System.NullRef erenceException ' occurred in WindowsApplicat ion1.exe
Additional information: Object reference not set to an instance of an object.
Please help me. // Spalten erstellen
dt.Columns.Add( "Modul", typeof(string)) .ReadOnly = true; dt.Columns.Add( "Zusatz..." , typeof(string)) .ReadOnly = true; dt.Columns.Add( "ALLE", typeof(bool));
.... //Spaltenbreite definieren
myTableStyle.Gr idColumnStyles["Modul"].Width=20; myTableStyle.Gr idColumnStyles["Zusatz..."].Width=50; myTableStyle.Gr idColumnStyles["ALLE"].Width=60;
In the debugger, could you please check if these column styles are
actually defined? You probably should add a new GridColumnStyle first.
Frans.
--
Get LLBLGen Pro, the new O/R mapper for .NET: http://www.llblgen.com
My .NET Blog: http://weblogs.asp.net/fbouma
Microsoft C# MVP
Frans Bouma [C# MVP] wrote: "michael walser" <mi************ @bingo.de> wrote in news:eZ******** *****@TK2MSFTNG P12.phx.gbl:
I get this message in "Spaltenbre ite definieren" => Definition for Columns Width
An unhandled exception of type 'System.NullRef erenceException ' occurred in WindowsApplicat ion1.exe
Additional information: Object reference not set to an instance of an object.
Please help me. // Spalten erstellen
dt.Columns.Ad d("Modul", typeof(string)) .ReadOnly = true; dt.Columns.Ad d("Zusatz..." , typeof(string)) .ReadOnly = true; dt.Columns.Ad d("ALLE", typeof(bool));
...
//Spaltenbreite definieren
myTableStyle. GridColumnStyle s["Modul"].Width=20; myTableStyle. GridColumnStyle s["Zusatz..."].Width=50; myTableStyle. GridColumnStyle s["ALLE"].Width=60;
In the debugger, could you please check if these column styles are actually defined? You probably should add a new GridColumnStyle first.
Frans.
Yes? that's right. I met with this error many time.
Frans Bouma [C# MVP] wrote: "michael walser" <mi************ @bingo.de> wrote in news:eZ******** *****@TK2MSFTNG P12.phx.gbl:
I get this message in "Spaltenbre ite definieren" => Definition for Columns Width
An unhandled exception of type 'System.NullRef erenceException ' occurred in WindowsApplicat ion1.exe
Additional information: Object reference not set to an instance of an object.
Please help me. // Spalten erstellen
dt.Columns.Ad d("Modul", typeof(string)) .ReadOnly = true; dt.Columns.Ad d("Zusatz..." , typeof(string)) .ReadOnly = true; dt.Columns.Ad d("ALLE", typeof(bool));
...
//Spaltenbreite definieren
myTableStyle. GridColumnStyle s["Modul"].Width=20; myTableStyle. GridColumnStyle s["Zusatz..."].Width=50; myTableStyle. GridColumnStyle s["ALLE"].Width=60;
In the debugger, could you please check if these column styles are actually defined? You probably should add a new GridColumnStyle first.
Frans.
Yes, that's right. I met with this error many time.
Yes it works.
// Tablestyle erstellen
DataGridTableSt yle myTableStyle = new DataGridTableSt yle();
myTableStyle.Ma ppingName = "DataTable_Bere chtigung";
MyDataGrid.Tabl eStyles.Clear() ;
// Spalten-Eigenschaften
DataGridTextBox Column Col_0 = new DataGridTextBox Column();
Col_0.MappingNa me="Modul";
Col_0.Width = 150;
Col_0.ReadOnly = true;
Col_0.HeaderTex t = "Module";
DataGridBoolCol umn Col_1 = new DataGridBoolCol umn();
Col_1.MappingNa me="ALLE";
Col_1.Width = 60;
Col_1.AllowNull = false;
Col_1.HeaderTex t = "ALLE";
Col_1.Alignment = System.Windows. Forms.Horizonta lAlignment.Cent er;
DataGridBoolCol umn Col_2 = new DataGridBoolCol umn();
......etc etc..
Thanks for your help
Michael This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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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.
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