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Binding DropDownList Using List Collection, Enum and DataSet in ASP.NET

, 21 Dec 2011
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Binding DropDownList Using List Collection, Enum and DataSet in ASP.NET
We can bind DropDownList in different ways by using List, Dictionary, Enum and DataSet.
 
To bind DropDownList, we need to set some properties:
 
  • DataSource
  • DataValueField
  • DataTextField
 
Let's see how to use these properties to bind DropDownList.
 
Binding DropDownList with List
 
In this case, the DropDownList both 'Value' and 'Text' field are same.
DropDownList ddl = new DropDownList();
List<string> countries = new List<string>();
countries.Add("USA");
countries.Add("India");
ddl.DataSource = countries;
ddl.DataBind();

Binding DropDownList with Dictionary

Dictionary<string, string> States = new Dictionary<string, string>();
States.Add("-1","-Select State-");
States.Add("AP", "Andhra Predesh");
States.Add("KA", "Karnataka");
States.Add("TN", "Tamilnadu");
States.Add("KL", "Kerala");
ddl.DataSource = States;
ddl.DataValueField = "Key";
ddl.DataTextField = "Value";
ddl.DataBind();

Binding DropDownList with DataSet

My DataSet contains a Class table(class_id,class_name,description).
ddl.DataSource = dataset.Tables[0].DefaultView;
ddl.DataValueField = "class_id"; 
ddl.DataTextField = "class_name";
ddl.DataBind();
ListItem item = new ListItem("-Select Class-", "-1");
ddl.Items.Insert(0, item);

Binding DropDownList with Enum

Let’s take Countries ‘enum’ as follows:
enum enCountries:int{India=0,USA,UK,UAE};
Let's see how to bind the DropDownList With Enum:
ddlEnumBind.Items.Add("--Select Country--");
//get enum items to get the respective enum value 
string[] enumNames=Enum.GetNames(typeof(enCountries));
foreach (string item in enumNames)
{
    //get the enum item value
    int value = (int)Enum.Parse(typeof(enCountries), item);
    ListItem listItem = new ListItem(item, value.ToString());
    ddlEnumBind.Items.Add(listItem);
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Rajesh Kumar Chekuri
Software Developer (Senior)
India India
If There Is Any suggestions Mail me raji539@yahoo.com
 
Best Regards
Rajesh Kumar Chekuri
www.techtasks.net
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Comments and Discussions

 
QuestionAsp.net mvc4 and WCF Pinmemberasma288129-Mar-13 4:41 
GeneralMy vote of 5 Pinmemberasp_crazy_guy12-Sep-12 20:33 
SuggestionAnother Easy method for country names in asp.net dropdownlist Pinmemberdharwishnasar11-Jul-12 21:07 
GeneralReason for my vote of 5 Good.. Refreshing Basics,, Pinmemberrahulpriyan26-Dec-11 21:33 

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