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How to select an item in AutoComplete from code behind by using the key field?

Platform: ASP.NET Web Forms |
Control: AutoComplete |
Product Version:
Tags: autocomplete


AutoComplete control value can be selected by using its key value from code behind.  This enables you to select a unique item when there are multiple items with the same Text value.


To select the AutoComplete TextBox value from code behind by using its Key value, you can use the SelectValueByKey property. By passing the corresponding Key value in the SelectValueByKey property, the Value is selected in the AutoComplete TextBox accordingly.


<ej:Autocomplete ID="AutoComplete1" runat="server" ShowPopupButton="true"/>


CodeBehind CS

protected void Page_Load(object sender, EventArgs e)
    this.AutoComplete1.DataSource = new AClist().GetDataItems().ToList();
    this.AutoComplete1.DataUniqueKeyField = "ID";
    this.AutoComplete1.DataTextField = "Text";
    this.AutoComplete1.SelectValueByKey = "6"; // new property to select item based on key
public class AClist {
    public AClist() { }
    public string ID { get; set; }
    public string Text { get; set; }
    public List<AClist> GetDataItems()
        List<AClist> data = new List<AClist>();
        data.Add(new AClist { ID = "1", Text = "Action Script" });
        data.Add(new AClist { ID = "2", Text = "C++" });
        data.Add(new AClist { ID = "3", Text = "Java" });
        data.Add(new AClist { ID = "4", Text = "Python" });
        data.Add(new AClist { ID = "5", Text = "C#" });
        data.Add(new AClist { ID = "6", Text = "FoxPro" });
        data.Add(new AClist { ID = "7", Text = "PHP" });
        data.Add(new AClist { ID = "8", Text = "Logo" });
        return data;



The SelectValueByKey property can also be set from the ASPX page.

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Abhishek Shandilya
Dec 03, 2018

How can i select multiple values programmatically. This solution works only for single item selection.


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