Code behind for bootstrap GridView

Search.aspx.vb

Imports ChildNutrition.Web.Common.Validation
Imports ChildNutrition.Web.Common
Imports ChildNutrition.Web.Extensions
Imports ChildNutrition.Web.DataAccess

Namespace MonthlyClaims.Maintenance.SchoolDistrict
    Public Class Search
        Inherits BasePage

        Dim schoolDistrictDataAccess As New SchoolDistrictDataAccess()

        Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
            If Not IsPostBack Then
                BindGrid(0)
            End If
        End Sub

        Protected Sub btnSearch_Click(sender As Object, e As EventArgs)
            BindGrid(0)
        End Sub

        Sub BindGrid(pageIndex As Integer)
            gvSchoolDistricts.PageIndex = pageIndex
            ValidateForm()
            If FormState.IsValid Then
                Dim pagedDataTable = schoolDistrictDataAccess.Query(pageIndex + 1, gvSchoolDistricts.PageSize, txtLEA.Text.NullIfEmpty(), txtFiscalYear.Text.Parse(Of Int16?), txtDistrictName.Text.NullIfEmpty())
                gvSchoolDistricts.VirtualItemCount = CInt(pagedDataTable.TotalItems)
                gvSchoolDistricts.DataSource = pagedDataTable.Table
                gvSchoolDistricts.DataBind()
            End If
        End Sub

        Sub ValidateForm()
            txtLEA.StripNonAlphanumeric().Validate("LEA").IsLea()
            txtFiscalYear.Validate("Fiscal Year").IsYear()
        End Sub

        Private Sub gvSchoolDistricts_PageIndexChanging(sender As Object, e As GridViewPageEventArgs) Handles gvSchoolDistricts.PageIndexChanging
            BindGrid(e.NewPageIndex)
        End Sub
    End Class
End Namespace