At least one CheckBox checked validation before adding dynamic row in ASP.Net GridView using C# and VB.Net

Hi sathish75,

Please refer below sample.

HTML

<asp:GridView ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false">
    <Columns>
        <asp:TemplateField HeaderText="Header 1">
            <ItemTemplate>
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Header 2">
            <ItemTemplate>
                <asp:CheckBox ID="chkMrng" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Header 3">
            <ItemTemplate>
                <asp:CheckBox ID="chkNoon" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Header 4">
            <ItemTemplate>
                <asp:CheckBox ID="chkNyt" runat="server" />
            </ItemTemplate>
            <FooterStyle HorizontalAlign="Right" />
            <FooterTemplate>
                <asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" OnClick="ButtonAdd_Click" />
            </FooterTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
<asp:Button ID="Button1" runat="server" Text="Save" OnClick="Button1_Click" />

Namespaces

C#

using System.Data;
using System.Data.SqlClient;
using System.Text;
using System.Collections.Specialized;

VB.Net

Imports System.Data
Imports System.Data.SqlClient

Code

C#

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

private void SetInitialRow()
{
    DataTable dt = new DataTable();
    DataRow dr = null;
    dt.Columns.Add(new DataColumn("Column1", typeof(string)));
    dt.Columns.Add(new DataColumn("Column2", typeof(string)));
    dt.Columns.Add(new DataColumn("Column3", typeof(string)));
    dt.Columns.Add(new DataColumn("Column4", typeof(string)));
    dr = dt.NewRow();
    dr["Column1"] = string.Empty;
    dr["Column2"] = string.Empty;
    dr["Column3"] = string.Empty;
    dr["Column4"] = string.Empty;
    dt.Rows.Add(dr);
    ViewState["CurrentTable"] = dt;
    Gridview1.DataSource = dt;
    Gridview1.DataBind();
}

private void AddNewRowToGrid()
{
    int rowIndex = 0;

    if (ViewState["CurrentTable"] != null)
    {
        DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
        DataRow drCurrentRow = null;
        int rowCount = dtCurrentTable.Rows.Count;
        bool isChecked = false;
        if (dtCurrentTable.Rows.Count > 0)
        {
            int index = 0;
            for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
            {
                bool checkedChk = false;
                //extract the TextBox values
                TextBox box1 = (TextBox)Gridview1.Rows[index].Cells[0].FindControl("TextBox1");
                CheckBox box2 = (CheckBox)Gridview1.Rows[index].Cells[1].FindControl("chkMrng");
                CheckBox box3 = (CheckBox)Gridview1.Rows[index].Cells[2].FindControl("chkNoon");
                CheckBox box4 = (CheckBox)Gridview1.Rows[index].Cells[3].FindControl("chkNyt");

                if (box2.Checked || box3.Checked || box4.Checked)
                {
                    checkedChk = true;
                    isChecked = checkedChk;
                }
                if (!checkedChk)
                {
                    isChecked = false;
                    ScriptManager.RegisterStartupScript(this, this.GetType(), "Message", "alert('Atlease one checkbox should be selected in row " + index + "');", true);
                    break;
                }
                index++;
            }
            if (isChecked)
            {
                for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
                {
                    //extract the TextBox values
                    TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[0].FindControl("TextBox1");
                    CheckBox box2 = (CheckBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("chkMrng");
                    CheckBox box3 = (CheckBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("chkNoon");
                    CheckBox box4 = (CheckBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("chkNyt");

                    drCurrentRow = dtCurrentTable.NewRow();
                    drCurrentRow["Column1"] = box1.Text;
                    drCurrentRow["Column2"] = box2.Checked ? "1" : "0";
                    drCurrentRow["Column3"] = box3.Checked ? "1" : "0";
                    drCurrentRow["Column4"] = box4.Checked ? "1" : "0";
                    rowIndex++;
                }
                if (drCurrentRow != null)
                {
                    dtCurrentTable.Rows.Add(drCurrentRow);
                    ViewState["CurrentTable"] = dtCurrentTable;
                }
            }

            Gridview1.DataSource = dtCurrentTable;
            Gridview1.DataBind();
        }
    }
    else
    {
        Response.Write("ViewState is null");
    }
    SetPreviousData();
}

private void SetPreviousData()
{
    int rowIndex = 0;
    if (ViewState["CurrentTable"] != null)
    {
        DataTable dt = (DataTable)ViewState["CurrentTable"];
        if (dt.Rows.Count > 0)
        {
            for (int i = 1; i < dt.Rows.Count; i++)
            {
                TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[0].FindControl("TextBox1");
                CheckBox box2 = (CheckBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("chkMrng");
                CheckBox box3 = (CheckBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("chkNoon");
                CheckBox box4 = (CheckBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("chkNyt");

                box1.Text = dt.Rows[i]["Column1"].ToString();
                box2.Checked = dt.Rows[i]["Column2"].ToString() == "1" ? true : false;
                box3.Checked = dt.Rows[i]["Column3"].ToString() == "1" ? true : false;
                box4.Checked = dt.Rows[i]["Column4"].ToString() == "1" ? true : false;

                rowIndex++;
            }
        }
    }
}

protected void ButtonAdd_Click(object sender, EventArgs e)
{
    AddNewRowToGrid();
}

protected void Button1_Click(object sender, EventArgs e)
{
    int rowIndex = 0;
    StringCollection sc = new StringCollection();
    if (ViewState["CurrentTable"] != null)
    {
        DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
        if (dtCurrentTable.Rows.Count > 0)
        {
            for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
            {
                //extract the TextBox values
                TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[0].FindControl("TextBox1");
                CheckBox box2 = (CheckBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("chkMrng");
                CheckBox box3 = (CheckBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("chkNoon");
                CheckBox box4 = (CheckBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("chkNyt");

                //get the values from the TextBoxes
                //then add it to the collections with a comma "," as the delimited values
                sc.Add(box1.Text + "," + box2.Text + "," + box3.Text + "," + box4.Text);
                rowIndex++;
            }
            //Call the method for executing inserts
            InsertRecords(sc);
        }
    }
}

private string GetConnectionString()
{
    return System.Configuration.ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
}


private void InsertRecords(StringCollection sc)
{
    SqlConnection conn = new SqlConnection(GetConnectionString());
    StringBuilder sb = new StringBuilder(string.Empty);
    string[] splitItems = null;
    foreach (string item in sc)
    {

        const string sqlStatement = "INSERT INTO SampleTable (Column1,Column2,Column3,Column4) VALUES";
        if (item.Contains(","))
        {
            splitItems = item.Split(",".ToCharArray());
            sb.AppendFormat("{0}('{1}','{2}','{3}','{4}'); ", sqlStatement, splitItems[0], splitItems[1], splitItems[2], splitItems[3]);

        }
    }

    try
    {
        conn.Open();
        SqlCommand cmd = new SqlCommand(sb.ToString(), conn);
        cmd.CommandType = CommandType.Text;
        cmd.ExecuteNonQuery();
        Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Script", "alert('Records Successfuly Saved!');", true);

    }
    catch (System.Data.SqlClient.SqlException ex)
    {
        string msg = "Insert Error:";
        msg += ex.Message;
        throw new Exception(msg);

    }
    finally
    {
        conn.Close();
    }
}

VB.Net

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

Private Sub SetInitialRow()
    Dim dt As DataTable = New DataTable()
    Dim dr As DataRow = Nothing
    dt.Columns.Add(New DataColumn("Column1", GetType(String)))
    dt.Columns.Add(New DataColumn("Column2", GetType(String)))
    dt.Columns.Add(New DataColumn("Column3", GetType(String)))
    dt.Columns.Add(New DataColumn("Column4", GetType(String)))
    dr = dt.NewRow()
    dr("Column1") = String.Empty
    dr("Column2") = String.Empty
    dr("Column3") = String.Empty
    dr("Column4") = String.Empty
    dt.Rows.Add(dr)
    ViewState("CurrentTable") = dt
    Gridview1.DataSource = dt
    Gridview1.DataBind()
End Sub
Private Sub AddNewRowToGrid()
    Dim rowIndex As Integer = 0
    If ViewState("CurrentTable") IsNot Nothing Then
        Dim dtCurrentTable As DataTable = CType(ViewState("CurrentTable"), DataTable)
        Dim drCurrentRow As DataRow = Nothing
        Dim rowCount As Integer = dtCurrentTable.Rows.Count
        Dim isChecked As Boolean = False
        If dtCurrentTable.Rows.Count > 0 Then
            Dim index As Integer = 0
            For i As Integer = 1 To dtCurrentTable.Rows.Count
                Dim checkedChk As Boolean = False
                Dim box1 As TextBox = CType(Gridview1.Rows(index).Cells(0).FindControl("TextBox1"), TextBox)
                Dim box2 As CheckBox = CType(Gridview1.Rows(index).Cells(1).FindControl("chkMrng"), CheckBox)
                Dim box3 As CheckBox = CType(Gridview1.Rows(index).Cells(2).FindControl("chkNoon"), CheckBox)
                Dim box4 As CheckBox = CType(Gridview1.Rows(index).Cells(3).FindControl("chkNyt"), CheckBox)
                If box2.Checked OrElse box3.Checked OrElse box4.Checked Then
                    checkedChk = True
                    isChecked = checkedChk
                End If

                If Not checkedChk Then
                    isChecked = False
                    ScriptManager.RegisterStartupScript(Me, Me.[GetType](), "Message", "alert('Atlease one checkbox should be selected in row " & index & "');", True)
                    Exit For
                End If

                index += 1
            Next
            If isChecked Then
                For i As Integer = 1 To dtCurrentTable.Rows.Count
                    Dim box1 As TextBox = CType(Gridview1.Rows(rowIndex).Cells(0).FindControl("TextBox1"), TextBox)
                    Dim box2 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(1).FindControl("chkMrng"), CheckBox)
                    Dim box3 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(2).FindControl("chkNoon"), CheckBox)
                    Dim box4 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(3).FindControl("chkNyt"), CheckBox)
                    drCurrentRow = dtCurrentTable.NewRow()
                    drCurrentRow("Column1") = box1.Text
                    drCurrentRow("Column2") = If(box2.Checked, "1", "0")
                    drCurrentRow("Column3") = If(box3.Checked, "1", "0")
                    drCurrentRow("Column4") = If(box4.Checked, "1", "0")
                    rowIndex += 1
                Next

                If drCurrentRow IsNot Nothing Then
                    dtCurrentTable.Rows.Add(drCurrentRow)
                    ViewState("CurrentTable") = dtCurrentTable
                End If
            End If

            Gridview1.DataSource = dtCurrentTable
            Gridview1.DataBind()
        End If
    Else
        Response.Write("ViewState is null")
    End If

    SetPreviousData()
End Sub

Private Sub SetPreviousData()
    Dim rowIndex As Integer = 0

    If ViewState("CurrentTable") IsNot Nothing Then
        Dim dt As DataTable = CType(ViewState("CurrentTable"), DataTable)

        If dt.Rows.Count > 0 Then

            For i As Integer = 1 To dt.Rows.Count - 1
                Dim box1 As TextBox = CType(Gridview1.Rows(rowIndex).Cells(0).FindControl("TextBox1"), TextBox)
                Dim box2 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(1).FindControl("chkMrng"), CheckBox)
                Dim box3 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(2).FindControl("chkNoon"), CheckBox)
                Dim box4 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(3).FindControl("chkNyt"), CheckBox)
                box1.Text = dt.Rows(i)("Column1").ToString()
                box2.Checked = If(dt.Rows(i)("Column2").ToString() = "1", True, False)
                box3.Checked = If(dt.Rows(i)("Column3").ToString() = "1", True, False)
                box4.Checked = If(dt.Rows(i)("Column4").ToString() = "1", True, False)
                rowIndex += 1
            Next
        End If
    End If
End Sub

Protected Sub ButtonAdd_Click(ByVal sender As Object, ByVal e As EventArgs)
    AddNewRowToGrid()
End Sub

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim rowIndex As Integer = 0
    Dim sc As StringCollection = New StringCollection()
    If ViewState("CurrentTable") IsNot Nothing Then
        Dim dtCurrentTable As DataTable = CType(ViewState("CurrentTable"), DataTable)

        If dtCurrentTable.Rows.Count > 0 Then
            For i As Integer = 1 To dtCurrentTable.Rows.Count
                Dim box1 As TextBox = CType(Gridview1.Rows(rowIndex).Cells(0).FindControl("TextBox1"), TextBox)
                Dim box2 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(1).FindControl("chkMrng"), CheckBox)
                Dim box3 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(2).FindControl("chkNoon"), CheckBox)
                Dim box4 As CheckBox = CType(Gridview1.Rows(rowIndex).Cells(3).FindControl("chkNyt"), CheckBox)
                sc.Add(box1.Text & "," + box2.Text & "," + box3.Text & "," + box4.Text)
                rowIndex += 1
            Next

            InsertRecords(sc)
        End If
    End If
End Sub

Private Function GetConnectionString() As String
    Return System.Configuration.ConfigurationManager.ConnectionStrings("constr").ConnectionString
End Function
Private Sub InsertRecords(ByVal sc As StringCollection)
    Dim conn As SqlConnection = New SqlConnection(GetConnectionString())
    Dim sb As StringBuilder = New StringBuilder(String.Empty)
    Dim splitItems As String() = Nothing
    For Each item As String In sc
        Const sqlStatement As String = "INSERT INTO SampleTable (Column1,Column2,Column3,Column4) VALUES"

        If item.Contains(",") Then
            splitItems = item.Split(",".ToCharArray())
            sb.AppendFormat("{0}('{1}','{2}','{3}','{4}'); ", sqlStatement, splitItems(0), splitItems(1), splitItems(2), splitItems(3))
        End If
    Next

    Try
        conn.Open()
        Dim cmd As SqlCommand = New SqlCommand(sb.ToString(), conn)
        cmd.CommandType = CommandType.Text
        cmd.ExecuteNonQuery()
        Page.ClientScript.RegisterClientScriptBlock(GetType(Page), "Script", "alert('Records Successfuly Saved!');", True)
    Catch ex As System.Data.SqlClient.SqlException
        Dim msg As String = "Insert Error:"
        msg += ex.Message
        Throw New Exception(msg)
    Finally
        conn.Close()
    End Try
End Sub

Screenshot