Keep retain DropDownList selected value inside FormView Edit mode in ASP.Net

Hi jferg,

Please refer below sample code.

HTML

<asp:FormView runat="server" ID="fvPhaudDets" DataKeyNames="CustomerId" OnItemUpdated="fvPhaudDets_OnItemUpdated"
    OnItemDeleted="fvPhaudDets_OnItemDeleted" OnDataBound="fvPhaudDets_OnDataBound"
    OnItemCommand="fvPhaudDets_OnItemCommand" OnModeChanging="fvPhaudDets_OnModeChanging">
    <ItemTemplate>
        <h3>
            Details</h3>
        <div class="row">
            <div class="col-xs-12 col-sm-1 col-md-1 col-lg-1 form-group">
                <strong>ID</strong><br />
                <asp:Label Text='<%# Eval("CustomerId") %>' runat="server" ID="IdLabel" CssClass="form-control" />
            </div>
            <div class="row">
                <div class="col-xs-12 col-sm-9 col-md-10 col-lg-10 form-group">
                    <asp:Label ID="qQOpClsCallLbl" runat="server" AssociatedControlID="QOpClsCallLabel"
                        Text="Did the representative open and close the call appropriately?*"></asp:Label>
                </div>
                <div class="col-xs-12 col-sm-3 col-md-2 col-lg-2 form-group">
                    <asp:Label Text='<%# Bind("Name") %>' runat="server" ID="QOpClsCallLabel" CssClass="form-control text-center" />
                </div>
            </div>
            <div class="row">
                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12 form-group">
                    <asp:LinkButton runat="server" Text="Edit" CommandName="Edit" ID="EditButton" CausesValidation="false"
                        CssClass="btn btn-primary" />
                </div>
            </div>
    </ItemTemplate>
    <EditItemTemplate>
        <h3>
            Editing</h3>
        <div class="row">
            <div class="col-xs-12 col-sm-1 col-md-1 col-lg-1 form-group">
                <strong>ID</strong><br />
                <asp:Label Text='<%# Eval("CustomerId") %>' runat="server" ID="IdLabel1" CssClass="form-control"
                    BackColor="#f5deb3" />
            </div>
            <div class="row">
                <div class="col-xs-12 col-sm-9 col-md-10 col-lg-10 form-group">
                    <asp:Label ID="qQOpClsCallLbl" runat="server" AssociatedControlID="QOpClsCallDdl"
                        Text="Did the representative open and close the call appropriately?*"></asp:Label>
                </div>
                <div class="col-xs-12 col-sm-3 col-md-2 col-lg-2 form-group">
                    <asp:DropDownList runat="server" ID="QOpClsCallDdl" AutoPostBack="True" DataSourceID="sdsScrGrp1"
                        CssClass="form-control text-center" AppendDataBoundItems="True" DataTextField="Country"
                        DataValueField="CustomerId" OnSelectedIndexChanged="QOpClsCallTextBox_OnSelectedIndexChanged" />
                </div>
            </div>
            <div class="row">
                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12 form-group">
                    <asp:LinkButton runat="server" Text="Update" CommandName="Update" ID="UpdateButton"
                        CausesValidation="True" CssClass="btn btn-success" OnClick="UpdateButton_OnClick" />&nbsp;
                    <asp:LinkButton runat="server" Text="Cancel" CommandName="Cancel" ID="UpdateCancelButton"
                        CausesValidation="False" CssClass="btn btn-danger" />
                </div>
            </div>
    </EditItemTemplate>
</asp:FormView>
<asp:SqlDataSource ID="sdsScrGrp1" runat="server" ConnectionString='<%$ ConnectionStrings:TestConnectionString %>'
    SelectCommand="SELECT [CustomerId], [Country] FROM [Customers]"></asp:SqlDataSource>
Country :
<asp:TextBox ID="txtCountry" runat="server" />

Namespaces

C#

using System.Data;
using System.Data.SqlClient;
using System.Configuration;

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Bind();
    }
}

private void Bind()
{
    string constr = ConfigurationManager.ConnectionStrings["TestConnectionString"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT * FROM Customers", con))
        {
            using (SqlDataAdapter da = new SqlDataAdapter(cmd))
            {
                DataTable dt = new DataTable();
                da.Fill(dt);
                fvPhaudDets.DataSource = dt;
                fvPhaudDets.DataBind();
            }
        }
    }
}

protected void fvPhaudDets_OnDataBound(object sender, EventArgs e)
{

}
protected void fvPhaudDets_OnItemCommand(object sender, FormViewCommandEventArgs e)
{

}
protected void fvPhaudDets_OnItemDeleted(object sender, FormViewDeletedEventArgs e)
{

}
protected void fvPhaudDets_OnItemUpdated(object sender, FormViewUpdatedEventArgs e)
{

}

protected void QOpClsCallTextBox_OnSelectedIndexChanged(object sender, EventArgs e)
{
    DropDownList ddlCountry = (DropDownList)fvPhaudDets.FindControl("QOpClsCallDdl");
    string country = ddlCountry.SelectedItem.Text;
    txtCountry.Text = country;
}

protected void UpdateButton_OnClick(object sender, EventArgs e)
{

}

protected void fvPhaudDets_OnModeChanging(object sender, FormViewModeEventArgs e)
{
    fvPhaudDets.ChangeMode(e.NewMode);
    Bind();
}

Screenshot