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Suggestion 1
The GridGroupingControl does not have the direct support to maintain the previous visible columns when loading the Form. In order to save the Visible Columns and use it while loading the Form, Serialization and Deserialization can be used. Please refer to the below link to know more about Serialization and Deserialization.
Please make use of below code and sample,
//Event Triggering
this.FormClosing += Form1_FormClosing;
//Event Customization
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
//To serialize the GridConditionalFormatDescriptor to XML file
XmlWriter writer = XmlWriter.Create("VisibleColumnsSchema.xml");
this.gridGroupingControl1.WriteXmlSchema(writer);
writer.Close();
}
this.Load += Form1_Load;
//Event Customization
private void Form1_Load(object sender, EventArgs e)
{
//DeSerialize the XML file to GridConditionalFormatDescriptorColloction
FileDialog dlg = new OpenFileDialog();
dlg.Filter = "xml files (*.xml)|*.xml|All files (*.*)|*.*";
if (dlg.ShowDialog() == DialogResult.OK)
{
XmlReader xr = new System.Xml.XmlTextReader(dlg.FileName);
//Apply the conditional formats.
this.gridGroupingControl1.ApplyXmlSchema(xr);
xr.Close();
}
}
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