In this article I will explain how to validate only certain selected GridView Row TextBox inside TemplateField ItemTemplate using ASP.Net RequiredField Validators
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HTML Markup
The HTML Markup contains a GridView with TextBox in the TemplateField ItemTemplate and RequiredField Validators for each TextBox. Each GridView Row also has a Button that will validate the GridView row it belongs. When you press the Button if any TextBox in the particular GridView Row is not filled with value the RequiredField Validators will be raised.
To make this happen, I have set ValidationGroup property for each Validator as well as the Button in a particular GridView row using Container.DataItemIndex, so that a unique Validation Group is set for each specific row and the Button control inside each GridView Row will validate only the controls belonging to its own row.
<asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
    RowStyle-BackColor="#A1DCF2" AlternatingRowStyle-BackColor="White" AlternatingRowStyle-ForeColor="#000"
    runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Item" HeaderText="Item" />
        <asp:TemplateField HeaderText="Price">
            <ItemTemplate>
                <asp:TextBox ID="txtPrice" runat="server" Text='<%# Eval("Price") %>'></asp:TextBox><br />
                <asp:RequiredFieldValidator ID="rfvPrice" ControlToValidate="txtPrice" runat="server"
                    ErrorMessage="Required" ForeColor="Red"
                    ValidationGroup = '<%# "Group_" + Container.DataItemIndex %>'></asp:RequiredFieldValidator>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Quantity">
            <ItemTemplate>
                <asp:TextBox ID="txtQuantity" runat="server" Text='<%# Eval("Quantity") %>'></asp:TextBox><br />
                <asp:RequiredFieldValidator ID="rfvQuantity" ControlToValidate="txtQuantity" runat="server"
                    ErrorMessage="Required" ForeColor="Red"
                    ValidationGroup = '<%# "Group_" + Container.DataItemIndex %>'></asp:RequiredFieldValidator>
            </ItemTemplate>
        </asp:TemplateField>
            <asp:TemplateField HeaderText="Quantity">
            <ItemTemplate>
                <asp:Button ID="btnSelect" runat="server" Text="Select" ValidationGroup = '<%# "Group_" + Container.DataItemIndex %>'/>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
 
 
Namespaces
using System.Data;
 
 
Binding the GridView
Here I am binding GridView using a DataTable with some dummy values.
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Item"), new DataColumn("Price"), new DataColumn("Quantity") });
        dt.Rows.Add("Shirt");
        dt.Rows.Add("Football", 299, 10);
        dt.Rows.Add("Shirt", 545, 15);
        dt.Rows.Add("Disc", 99, 20);
        dt.Rows.Add("Watch", 200, 45);
        dt.Rows.Add("Clock", 670, 97);
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}
 
Validate only certain selected GridView Row Controls like TextBox using ASP.Net Validators
 
 
Demo
View Demo
 
 
Downloads