Solved

How can I implement full databinding with an Enum?

Posted on 2008-10-15
2
189 Views
Last Modified: 2010-04-15
I can easily load an enum into a combobox, but I am struggling to pass the selected data back to the table.  I am surely missing something simple, so can anyone help?

Chris Bray
public enum Gender
    {
        Unknown,
        Male,
        Female
    }
            
// in the relevant location:
genderAutoCompleteCombo.DataSource = Enum.GetValues(typeof(Gender));
genderAutoCompleteCombo.DisplayMember = "Display";  // this is not right
genderAutoCompleteCombo.ValueMember = "Value";  // nor is this
genderAutoCompleteCombo.DataBindings.Add("SelectedValue", adapter.Table, "GenderId");  // this should work once the other two are fixed!

Open in new window

0
Comment
Question by:chrisbray
2 Comments
 
LVL 26

Accepted Solution

by:
Anurag Thakur earned 500 total points
ID: 22727620
you need to loop through an enum and create a datatable first and then bind it to the datasource
you cannot do it directly

how to loop through enum and get name and value out - sample given below
int val;
foreach (string str in Enum.GetNames(typeof(enumName)))
{
      val = (int)Enum.Parse(typeof(enumName), str); // this is the int value of the enum
      // str is the name in the enum
      // this you can add to a datable
}
0
 
LVL 3

Author Comment

by:chrisbray
ID: 22729090
Hi ragi0017:

Thaks for that.  I am surprised that there is not a better / quicker way, and I had thought about putting the data in a table in the first place which would also help with localisation.

Howver, I have implemented it as you suggest and put the full working code below in case someone else is looking for it in the future.

Chris Bray

            genderTable = new DataTable();
            DataColumn primaryColumn = new DataColumn("Id", typeof(int));
            genderTable.Columns.Add(primaryColumn);
            genderTable.Columns.Add(new DataColumn("Gender", typeof(string)));
            genderTable.Columns.Add(new DataColumn("Value", typeof(int)));
 
            genderTable.PrimaryKey = new DataColumn[] { primaryColumn };
            
            int val;
            int count = 0;
            foreach (string str in Enum.GetNames(typeof(Gender)))
            {
                val = (int)Enum.Parse(typeof(Gender), str); // this is the int value of the enum
                // str is the name in the enum
                // this you can add to a datable            
 
                DataRow row = genderTable.NewRow();
                row["Id"] = count++;
                row["Gender"] = str;
                row["Value"] = val;
                genderTable.Rows.Add(row);            
            }
 
            genderAutoCompleteCombo.DataSource = genderTable;
            genderAutoCompleteCombo.DisplayMember = "Gender";
            genderAutoCompleteCombo.ValueMember = "Value";
            genderAutoCompleteCombo.DataBindings.Add("SelectedValue", adapter.Table, "GenderId");

Open in new window

0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Extention Methods in C# 3.0 by Ivo Stoykov C# 3.0 offers extension methods. They allow extending existing classes without changing the class's source code or relying on inheritance. These are static methods invoked as instance method. This…
Summary: Persistence is the capability of an application to store the state of objects and recover it when necessary. This article compares the two common types of serialization in aspects of data access, readability, and runtime cost. A ready-to…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

839 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question