Validate Repeater each row TextBox with other in ASP.Net

Hi telldurges,

Please refer below sample.

HTML

<asp:Repeater ID="rptValidate" runat="server">
    <HeaderTemplate>
        <table cellspacing="0" rules="all" border="1">
            <tr>
                <th>
                    Class
                </th>
                <th>
                    Section
                </th>
                <th>
                    PerWeek
                </th>
                <th>
                    Period
                </th>
                <th>
                    Recess
                </th>
                <th>
                    ClassWing
                </th>
                <th>
                </th>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td>
                <asp:Label ID="lblClass" runat="server" Text='<%#Eval("Class") %>'></asp:Label>
            </td>
            <td>
                <asp:Label ID="lblSection" runat="server" Text='<%#Eval("Section") %>'></asp:Label>
            </td>
            <td>
                <asp:TextBox ID="txtCountry" runat="server" Text='<%# Eval("WorkingDaysPerWeek") %>' />
            </td>
            <td>
                <asp:TextBox ID="txtPerDay" runat="server" Text='<%# Eval("PerDay") %>' />
            </td>
            <td>
                <asp:TextBox ID="txtPeriodPerWeek" runat="server" Text='<%# Eval("ProcessAfterPeriodPerWeek") %>' />
            </td>
            <td>
                <asp:Label ID="Label1" runat="server" Text='<%#Eval("ClassWing") %>'></asp:Label>
            </td>
        </tr>
    </ItemTemplate>
</asp:Repeater>
<asp:Button ID="btnUpdate" runat="server" Text="Update" OnClick="Update" />

Namespaces

C#

using System.Data;

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[] { new DataColumn("Class", typeof(string)), 
                        new DataColumn("Section", typeof(string)), 
                        new DataColumn("WorkingDaysPerWeek", typeof(int)), 
                        new DataColumn("PerDay", typeof(int)),
                        new DataColumn("ProcessAfterPeriodPerWeek", typeof(int)),
                        new DataColumn("ClassWing", typeof(string)) });
        dt.Rows.Add("LKG", "COM-D", 6, 5, "6", "Primary");
        dt.Rows.Add("LKG", "COM-E", 6, 8, "6", "Primary");
        dt.Rows.Add("LKG", "COM-F", 6, 8, "6", "Primary");
        dt.Rows.Add("LKG", "COM-B", 6, 8, "6", "Primary");
        dt.Rows.Add("LKG", "COM-C", 6, 8, "6", "Primary");
        this.rptValidate.DataSource = dt;
        this.rptValidate.DataBind();
    }
}

protected void Update(object sender, EventArgs e)
{
    TextBox txtPerDay = null;
    TextBox txtPerWeek = null;
    int i = 0;
    foreach (RepeaterItem item in rptValidate.Items)
    {
        txtPerDay = item.FindControl("txtPerDay") as TextBox;
        txtPerWeek = item.FindControl("txtPeriodPerWeek") as TextBox;
        int perday = Convert.ToInt32(txtPerDay.Text);
        int perweek = Convert.ToInt32(txtPerWeek.Text);
        if (perweek > perday)
        {
            ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('For row number" + (i + 1) + " recess period must be less than period')", true);
        }
        i++;
    }
}

Screenshot