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ValueConverter.ConvertFromStorageType(Object) Method

When overridden in a derived class, converts the value which is stored in a data store to the persistent property’s value.

Namespace: DevExpress.Xpo.Metadata

Assembly: DevExpress.Xpo.v21.2.dll


public abstract object ConvertFromStorageType(
    object value


Name Type Description
value Object

An object which represents the value to convert.


Type Description

An object which represents the converted value.


The following code example demonstrates how to store your boolean data in the database using the “T” string for true and “F” for false by defining a new ValueConverter descendant. You may need this converter when using an existing database in which boolean properties are stored such form.

[Size(1), ValueConverter(typeof(BooleanToStringValueConverter))]
public bool Answer {
    get { return GetPropertyValue<bool>(nameof(Answer)); }
    set { SetPropertyValue<bool>(nameof(Answer), value); }

public class BooleanToStringValueConverter : ValueConverter {
    public override object ConvertFromStorageType(object value) {
        return Convert.ToString(value) == "T";
    public override object ConvertToStorageType(object value) {
        return Convert.ToBoolean(value) ? "T" : "F";
    public override System.Type StorageType {
        get { return typeof(string); }
See Also