How to bind Gridview using Sqldataadapter, Datatable and Query in Asp.net(C#, VB)?

Introduction: In this post I have try to explain how to bind Gridview in Asp.net.

Description:
I have create a table name STUDENT_DETAIL and insert data into table.

STUDENT_ID	int
STUDENT_NAME	varchar(50)
STUDENT_ADDRESS	varchar(50)
STUDENT_CLASS	varchar(50)

STUDENT_ID is primary key.

Now open the Visual Studio>Go to File>New>Website. Add the Connectionstring in web.config file of website.

<configuration>

       <connectionStrings>

    <add name="connection" connectionString="Data Source=SYS-1F78031ED0A;Initial Catalog=TestBlog;Integrated Security=True"/>

       </connectionStrings>

       <system.web>

        <compilation debug="true" targetFramework="4.0" />

    </system.web>

</configuration>

After that add new web form to website, drag and drop the Gridview data control from
Toolbox. After that add the Template field and ItemTemplate in Gridview as structure mention below.

<asp:GridView ID="grdstudentdetail" runat="server" AutoGenerateColumns="False" DataKeyNames="STUDENT_ID">

            <Columns>

                <asp:TemplateField HeaderText="STUDENT NAME">

                    <ItemTemplate>

                        <asp:Label ID="lblname" runat="server" Text='<%# Eval("STUDENT_NAME") %>'></asp:Label>

                    </ItemTemplate>

                </asp:TemplateField>

                <asp:TemplateField HeaderText="STUDENT ADDRESS">

                    <ItemTemplate>

                        <asp:Label ID="lbladdress" runat="server" Text='<%# Eval("STUDENT_ADDRESS") %>'></asp:Label>

                    </ItemTemplate>

                </asp:TemplateField>

                <asp:TemplateField HeaderText="STUDENT CLASS">

                    <ItemTemplate>

                        <asp:Label ID="lblclass" runat="server" Text='<%# Eval("STUDENT_CLASS") %>'></asp:Label>

                    </ItemTemplate>

                </asp:TemplateField>

            </Columns>

        </asp:GridView>

Now go to .aspx.cs page and add namespace.

using System.Configuration;

using System.Data.SqlClient;

using System.Data;

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connection"].ToString());

    protected void Page_Load(object sender, EventArgs e)

    {

        if (con.State == ConnectionState.Closed)

        {

            con.Open();

        }

        if (!IsPostBack)

        {

            Bindgridview();

        }

    }

    private void Bindgridview()

    {

        try

        {

            SqlDataAdapter adp = new SqlDataAdapter("Select * from STUDENT_DETAIL", con);

            DataTable dt = new DataTable();

            adp.Fill(dt);

            if (dt.Rows.Count > 0)

            {

                grdstudentdetail.DataSource = dt;

                grdstudentdetail.DataBind();

            }

            else

            {

                dt.Rows.Add(dt.NewRow());

                grdstudentdetail.DataSource = dt;

                grdstudentdetail.DataBind();

                int columncount = grdstudentdetail.Rows[0].Cells.Count;

                grdstudentdetail.Rows[0].Cells.Clear();

                grdstudentdetail.Rows[0].Cells.Add(new TableCell());

                grdstudentdetail.Rows[0].Cells[0].ColumnSpan = columncount;

                grdstudentdetail.Rows[0].Cells[0].Text = "No Records Available

";

            }

        }

        catch (Exception ex)

        {

        }

    }

In VB:

Add namespace to .aspx.vb page.

Imports System.Data

Imports System.Data.SqlClient

Imports System.Configuration

Create a function to bind Gridview.

Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("connection").ToString())

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        If con.State = ConnectionState.Closed Then

            con.Open()

        End If

        If Not IsPostBack Then

            Bindgridview()

        End If

    End Sub

    Private Sub Bindgridview()

        Try

            Dim adp As New SqlDataAdapter("Select * from STUDENT_DETAIL", con)

            Dim dt As New DataTable()

            adp.Fill(dt)

            If dt.Rows.Count > 0 Then

                grdstudentdetail.DataSource = dt

                grdstudentdetail.DataBind()

            Else

                dt.Rows.Add(dt.NewRow())

                grdstudentdetail.DataSource = dt

                grdstudentdetail.DataBind()

                Dim columncount As Integer = grdstudentdetail.Rows(0).Cells.Count

                grdstudentdetail.Rows(0).Cells.Clear()

                grdstudentdetail.Rows(0).Cells.Add(New TableCell())

                grdstudentdetail.Rows(0).Cells(0).ColumnSpan = columncount

                grdstudentdetail.Rows(0).Cells(0).Text = "No Records Available"

            End If

        Catch ex As Exception

        End Try

    End Sub

Now debug the application and check the result.

Related Articles on Gridview:

Ø  How toBind,Edit,Update and Delete in Gridview in Asp.net

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Ø  How to Bind Gridview using Store Procedure, SqlDataAdapterand Datatable in Asp.net

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