DevExpress XtraGridView 控件的问题

Question

I have one xtragrid control on my devxpress form . I've created the columns of my grid at runtime when i load the form . I'm developing the Field chooser for my grid view which is situated on the same form. For that i used the repositoryItemCheckedComboBoxEdit control & in that control i added the column names which will be present in the xtragrid.

Basically i created the columns to the xtragrid with the Visible property to false. When user checks particular column name by using repositoryItemCheckedComboBoxEdit then i set the Visible to true & again if user unchecked the column name then again i set the visible to false. & while creating column i set the width of the column.

Problem which i'm facing is that if user select the all fields from the repositoryItemCheckedComboBoxEdit then the grid control should show the horizontal scroll bar automatically when require.

And another problem is that with the columns is besides setting the width of the column, it is not showing the required width of that column. it shrinks that all column width.

code which i use for creating column to the xtragridview at run time is as follows -

 public void AddGridColumn(string fieldName, string caption, int nRowWidth, RepositoryItem Item, object oCollection, string DisplayMember, string ValueMember, string format, FormatType type)
        {
            DevExpress.XtraGrid.Columns.GridColumn column = ColumnView.Columns.AddField(fieldName);
            column.Caption = caption;
            column.ColumnEdit = Item;
            column.DisplayFormat.FormatType = type;
            column.DisplayFormat.FormatString = format;
            column.VisibleIndex =  ColumnView.VisibleColumns.Count;
            column.Width = nRowWidth;
        }

code for the field chooser is as follows - I used this function for filling the items of the repositoryItemCheckedComboBoxEdit control

private void FieldCollection()
    {
        allFields = new ArrayList();
        columnNames = new Dictionary<string, string>();
        allFields.Clear();
        repositoryItemCheckedComboBoxEdit1.Items.Clear();
        for (int i = 0; i < gvBase.Columns.Count; i++)
        {
            allFields.Add(gvBase.Columns[i].Caption );
            if (gvBase.Columns[i].FieldName != "ContactID")
            {
                if (gvBase.Columns[i].Visible == true)
                {
                    if (gvBase.Columns[i].Caption != "Label1" && gvBase.Columns[i].Caption != "Label2" && gvBase.Columns[i].Caption != "Label3" && gvBase.Columns[i].Caption != "Label4" && gvBase.Columns[i].Caption != "Label5")
                        repositoryItemCheckedComboBoxEdit1.Items.Add(gvBase.Columns[i].Caption, CheckState.Checked);
                    if (!columnNames.ContainsKey(gvBase.Columns[i].Caption))
                        columnNames.Add(gvBase.Columns[i].Caption, gvBase.Columns[i].FieldName);
                }
                else
                {
                    if (gvBase.Columns[i].Caption != "Label1" && gvBase.Columns[i].Caption != "Label2" && gvBase.Columns[i].Caption != "Label3" && gvBase.Columns[i].Caption != "Label4" && gvBase.Columns[i].Caption != "Label5")

                        repositoryItemCheckedComboBoxEdit1.Items.Add(gvBase.Columns[i].Caption, CheckState.Unchecked);
                    if (!columnNames.ContainsKey(gvBase.Columns[i].FieldName))
                        columnNames.Add(gvBase.Columns[i].Caption, gvBase.Columns[i].FieldName);

                }
            }
        }
        cmbFieldChooser.EditValue = "";
    }

this is used for the repositoryItemCheckedComboBoxEdit control event -

private void cmbFieldChooser_EditValueChanged(object sender, EventArgs e)
        {
            ArrayList temp = new ArrayList();
            temp.AddRange(allFields);

            string[] strFields = cmbFieldChooser.EditValue.ToString().Split(',');
            for (int i = 0; i < strFields.Length; i++)
            {
                if (temp.Contains(strFields[i].Trim()))
                    temp.Remove(strFields[i].Trim());
                if (strFields[i] != "")
                {
                    if (columnNames.ContainsKey(strFields[i].Trim()))
                    {
                        if (gvBase.Columns[columnNames[strFields[i].Trim()]].Visible == false)
                        {
                            gvBase.Columns[columnNames[strFields[i].Trim()]].Visible = true;
                            gvBase.Columns[columnNames[strFields[i].Trim()]].BestFit();

                        }
                    }
                }
            }
            if (temp.Count < 20)
            {
                for (int j = 0; j < temp.Count; j++)
                {
                    if (columnNames.ContainsKey(temp[j].ToString().Trim()))
                    {
                        gvBase.Columns[columnNames[temp[j].ToString().Trim()]].Visible = false;
                    }
                }
            }
            cmbFieldChooser.EditValue = repositoryItemCheckedComboBoxEdit1.GetCheckedItems();
            if ((cmbFieldChooser.EditValue.ToString()).Split(',').Length > 5)
            {
                gvBase.OptionsView.ColumnAutoWidth = false;
                gvBase.BestFitColumns();
                gvBase.HorzScrollVisibility = ScrollVisibility.Always;
            }
            else
            {
                gvBase.OptionsView.ColumnAutoWidth = true;
                gvBase.HorzScrollVisibility = ScrollVisibility.Never;
            }

        }

How to resolve this problem?

thanks.

Answer 1

How many columns do you have in your Grid?

I see you have code there to turn off the ColumnAutoWidth once you go past 5 columns (ie 6 columns or more). Have you debugged this condition to ensure the ColumnAutoWidth is indeed being turned off?

As per BestFitColumns Help Doc the BestFitColumns will only calculate for the first n rows as per the BestFitMaxRowCount property unless it it set to -1, could this be a cause?

The other thing that seems a little odd if that you are setting the EditValue of cmdFieldChooser within the cmdFieldChooser_EditValueChanged event... why so?