C# – Troubles retrieving data from within OnRowCommand from a GridViews

asp.netcdynamic-datagridview

If I have this <asp:ButtonField runat="server" DataTextField="Name" CommandName="GetName"></asp:ButonField> Within a GridView. Is there any way to retrieve the DataTextField (Name) from the OnRowCommand method?

<asp:GridView ID="GridView1" runat="server" 
 AllowPaging="True" AutoGenerateColumns="False" 
 DataSourceID="ObjectDataSource_Names" 
 DataKeyNames="ID,ModuleId" OnRowCommand="ChangeName">

Or alternatively, is there any way to make CommandName into an attribute where the command is dynamically entered based on given data, similar to the difference between DataTextField vs TextField.

Best Answer

I added <asp:BoundField DataField="Name" /> Then you can retrieve it using the same method here: GridView.onRowCommand Method

All I need to do now is find out a way to hide the field. If anyone knows how to, please let me know. Visible="false" gets rid of the field all together...

Related Solutions

C# – Retrieving Property name from lambda expression

I recently did a very similar thing to make a type safe OnPropertyChanged method.

Here's a method that'll return the PropertyInfo object for the expression. It throws an exception if the expression is not a property.

public PropertyInfo GetPropertyInfo<TSource, TProperty>(
    TSource source,
    Expression<Func<TSource, TProperty>> propertyLambda)
{
    Type type = typeof(TSource);

    MemberExpression member = propertyLambda.Body as MemberExpression;
    if (member == null)
        throw new ArgumentException(string.Format(
            "Expression '{0}' refers to a method, not a property.",
            propertyLambda.ToString()));

    PropertyInfo propInfo = member.Member as PropertyInfo;
    if (propInfo == null)
        throw new ArgumentException(string.Format(
            "Expression '{0}' refers to a field, not a property.",
            propertyLambda.ToString()));

    if (type != propInfo.ReflectedType &&
        !type.IsSubclassOf(propInfo.ReflectedType))
        throw new ArgumentException(string.Format(
            "Expression '{0}' refers to a property that is not from type {1}.",
            propertyLambda.ToString(),
            type));

    return propInfo;
}

The source parameter is used so the compiler can do type inference on the method call. You can do the following

var propertyInfo = GetPropertyInfo(someUserObject, u => u.UserID);

R – Gridview ControlState very large even when viewstate disabled and not using DataKeyNames

i think its normal because: control state cannot be disabled, Control state is designed for storing a control's essential data (such as a pager control's page number) that must be available on postback to enable the control to function even when view state has been disabled

note: By default, the ASP.NET page framework stores control state in the page in the same hidden element in which it stores view state. Even if view state is disabled microsoft said

that mean you actually saw the data of ControlState in _ViewState field which is ok because as microsoft said the ControlState of the control stored in viewstate even if you disable ViewState

Best Answer

Related Solutions

C# – Retrieving Property name from lambda expression

R – Gridview ControlState very large even when viewstate disabled and not using DataKeyNames

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