/// <devdoc>
/// </devdoc>
private static object Eval(object container, string[] expressionParts)
{
Debug.Assert((expressionParts != null) && (expressionParts.Length != 0),
"invalid expressionParts parameter");
object prop;
int i;
for (prop = container, i = 0; (i < expressionParts.Length) && (prop != null); i++)
{
string expr = expressionParts[i];
bool indexedExpr = expr.IndexOfAny(indexExprStartChars) >= 0;
if (indexedExpr == false)
{
prop = DataBinder.GetPropertyValue(prop, expr);
}
else
{
prop = DataBinder.GetIndexedPropertyValue(prop, expr);
}
}
return(prop);
}
/// <devdoc>
/// </devdoc>
public static string GetPropertyValue(object container, string propName, string format)
{
object value = DataBinder.GetPropertyValue(container, propName);
if ((value == null) || (value == System.DBNull.Value))
{
return(string.Empty);
}
else
{
if (String.IsNullOrEmpty(format))
{
return(value.ToString());
}
else
{
return(string.Format(format, value));
}
}
}
/// <devdoc>
/// </devdoc>
public static object GetIndexedPropertyValue(object container, string expr)
{
if (container == null)
{
throw new ArgumentNullException("container");
}
if (String.IsNullOrEmpty(expr))
{
throw new ArgumentNullException("expr");
}
object prop = null;
bool intIndex = false;
int indexExprStart = expr.IndexOfAny(indexExprStartChars);
int indexExprEnd = expr.IndexOfAny(indexExprEndChars, indexExprStart + 1);
if ((indexExprStart < 0) || (indexExprEnd < 0) ||
(indexExprEnd == indexExprStart + 1))
{
throw new ArgumentException();//UNDONE
}
string propName = null;
object indexValue = null;
string index = expr.Substring(indexExprStart + 1, indexExprEnd - indexExprStart - 1).Trim();
if (indexExprStart != 0)
{
propName = expr.Substring(0, indexExprStart);
}
if (index.Length != 0)
{
if (((index[0] == '"') && (index[index.Length - 1] == '"')) ||
((index[0] == '\'') && (index[index.Length - 1] == '\'')))
{
indexValue = index.Substring(1, index.Length - 2);
}
else
{
if (Char.IsDigit(index[0]))
{
// treat it as a number
int parsedIndex;
intIndex = Int32.TryParse(index, NumberStyles.Integer, CultureInfo.InvariantCulture, out parsedIndex);
if (intIndex)
{
indexValue = parsedIndex;
}
else
{
indexValue = index;
}
}
else
{
// treat as a string
indexValue = index;
}
}
}
if (indexValue == null)
{
throw new ArgumentException();//UNDONE
}
object collectionProp = null;
if ((propName != null) && (propName.Length != 0))
{
collectionProp = DataBinder.GetPropertyValue(container, propName);
}
else
{
collectionProp = container;
}
if (collectionProp != null)
{
Array arrayProp = collectionProp as Array;
if (arrayProp != null && intIndex)
{
prop = arrayProp.GetValue((int)indexValue);
}
else if ((collectionProp is IList) && intIndex)
{
prop = ((IList)collectionProp)[(int)indexValue];
}
else
{
PropertyInfo propInfo =
collectionProp.GetType().GetProperty("Item", BindingFlags.Public | BindingFlags.Instance, null, null, new Type[] { indexValue.GetType() }, null);
if (propInfo != null)
{
prop = propInfo.GetValue(collectionProp, new object[] { indexValue });
}
else
{
throw new ArgumentException();//UNDONE
}
}
}
return(prop);
}
/// <include file='doc\DataBinder.uex' path='docs/doc[@for="DataBinder.GetIndexedPropertyValue"]/*' />
/// <devdoc>
/// </devdoc>
public static object GetIndexedPropertyValue(object container, string expr)
{
if (container == null)
{
throw new ArgumentNullException("container");
}
if ((expr == null) || (expr.Length == 0))
{
throw new ArgumentNullException("expr");
}
object prop = null;
bool intIndex = false;
int indexExprStart = expr.IndexOfAny(indexExprStartChars);
int indexExprEnd = expr.IndexOfAny(indexExprEndChars, indexExprStart + 1);
if ((indexExprStart < 0) || (indexExprEnd < 0) ||
(indexExprEnd == indexExprStart + 1))
{
throw new ArgumentException(HttpRuntime.FormatResourceString(SR.DataBinder_Invalid_Indexed_Expr, expr));
}
string propName = null;
object indexValue = null;
string index = expr.Substring(indexExprStart + 1, indexExprEnd - indexExprStart - 1).Trim();
if (indexExprStart != 0)
{
propName = expr.Substring(0, indexExprStart);
}
if (index.Length != 0)
{
if (((index[0] == '"') && (index[index.Length - 1] == '"')) ||
((index[0] == '\'') && (index[index.Length - 1] == '\'')))
{
indexValue = index.Substring(1, index.Length - 2);
}
else
{
if (Char.IsDigit(index[0]))
{
// treat it as a number
try {
indexValue = Int32.Parse(index, CultureInfo.InvariantCulture);
intIndex = true;
}
catch (Exception) {
// fall back on string
indexValue = index;
}
}
else
{
// treat as a string
indexValue = index;
}
}
}
if (indexValue == null)
{
throw new ArgumentException(HttpRuntime.FormatResourceString(SR.DataBinder_Invalid_Indexed_Expr, expr));
}
object collectionProp = null;
if ((propName != null) && (propName.Length != 0))
{
collectionProp = DataBinder.GetPropertyValue(container, propName);
}
else
{
collectionProp = container;
}
if (collectionProp != null)
{
if ((collectionProp is Array) && intIndex)
{
prop = ((object[])collectionProp)[(int)indexValue];
}
else if ((collectionProp is IList) && intIndex)
{
prop = ((IList)collectionProp)[(int)indexValue];
}
else
{
PropertyInfo propInfo =
collectionProp.GetType().GetProperty("Item", BindingFlags.Public | BindingFlags.Instance, null, null, new Type[] { indexValue.GetType() }, null);
if (propInfo != null)
{
prop = propInfo.GetValue(collectionProp, new object[] { indexValue });
}
else
{
throw new ArgumentException(HttpRuntime.FormatResourceString(SR.DataBinder_No_Indexed_Accessor, collectionProp.GetType().FullName));
}
}
}
return(prop);
}
