There is a Gridview in my web page in which data is coming from below Table 1IdNameValue1aa302bb803cc60HTMLlthead id34Head134 runat34server34gt lttitlegtlttitlegt ltscript type34textjavascript34gt function RadioCheckrb var gv documentgetElementById34ltGridView1ClientIDgt34 var rbs gvgetElementsByTagName34input34 var row rbparentNodeparentNode for var i 0

Here i have find the max value from DataTable using linq then i keep this value in ViewState In the RowDataBound event of GridView i have compared the ViewState value with Cell value if its matched then i checked the RadioButton of that GridViewRowHTMLltaspGridView ID34GridView134 runat34server34 AutoGenerateColumns34False34 OnRowDataBound34GridView1RowDataBound34 HeaderStyleBackColor343AC0F234 HeaderStyleForeColor34White34gt ltColumnsgt ltaspBoundField DataField34id34 HeaderText34ID34 ItemStyleWidth343034 gt ltaspBoundField DataField34Name34 HeaderText34Name34 ItemStyleWidth345034 gt ltaspBoundField DataField34Value34 HeaderText34Value34 ItemStyleWidth345034 gt ltaspTemplateField HeaderText34Select34gt ltItemTemplategt ltaspRadioButton ID34RadioButton134 runat

Select (Check) RadioButton with Maximum Value in GridView in ASP.Net

Priyanka...

SOLVED CLOSED ACTIVE ANSWERED
User: Priyanka12
Posted: on Apr 29, 2014 12:30 AM
Forum: Data Controls
Answer: 1
Views: 3690

There is a Gridview in my web page in which data is coming from below Table 1:

Id	Name	Value
1	aa	30
2	bb	80
3	cc	60

HTML:

<head id="Head1" runat="server">
    <title></title>
    <script type="text/javascript">
        function RadioCheck(rb) {
            var gv = document.getElementById("<%=GridView1.ClientID%>");
            var rbs = gv.getElementsByTagName("input");
            var row = rb.parentNode.parentNode;
            for (var i = 0; i < rbs.length; i++) {
                if (rbs[i].type == "radio") {
                    if (rbs[i].checked && rbs[i] != rb) {
                        rbs[i].checked = false;
                        break;
                    }
                }
            }
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" AllowPaging="True"
            PageSize="8" OnPageIndexChanging="GridView1_PageIndexChanging">
            <Columns>
                <asp:BoundField DataField="id" HeaderText="ID" />
                <asp:BoundField DataField="Name" HeaderText="Name" />
                <asp:BoundField DataField="" HeaderText="Value" />
                <asp:TemplateField HeaderText="Select">
                    <ItemTemplate>
                        <asp:RadioButton ID="RadioButton1" runat="server" onclick="RadioCheck(this);" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:Button ID="BShow" runat="server" Text="Show Data" OnClick="BShow_Click" />
    </div>
    </form>
</body>

C#:

protected void GridBind()
{
    string query = "SELECT * FROM sgwebdb.qualicision_detail ORDER BY `Values` DESC;";
    this.GridView1.DataSource = DataManager.DatabaseManager.GetOrCreateConnection(DataManager.DatabaseManager.ConnectionType.MySQL).GetData(query);
    GridView1.DataBind();
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    GridView1.PageIndex = e.NewPageIndex;
    GridBind();
}
//bydefault select 1st radio button
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        if (e.Row.RowIndex == 0)
        {
            RadioButton rb = (RadioButton)e.Row.FindControl("RadioButton1");
            rb.Checked = true;
        }
    }
}

How to set the Gridview RadioButton ByDefault selected for a particular row whose "Value" (from above Table 1) is highest.

Please reply.

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Azim

0 2

Reply
ANSWER
User: Azim
Replied: on Apr 29, 2014 02:09 AM
Modified: on Apr 29, 2014 02:17 AM
Report

Here i have find the max value from DataTable using linq then i keep this value in ViewState. In the RowDataBound event of GridView i have compared the ViewState value with Cell value if its matched then i checked the RadioButton of that GridViewRow.

HTML

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowDataBound="GridView1_RowDataBound"
    HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White">
    <Columns>
        <asp:BoundField DataField="id" HeaderText="ID" ItemStyle-Width="30" />
        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="50" />
        <asp:BoundField DataField="Value" HeaderText="Value" ItemStyle-Width="50" />
        <asp:TemplateField HeaderText="Select">
            <ItemTemplate>
                <asp:RadioButton ID="RadioButton1" runat="server" onclick="RadioCheck(this);" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
<hr />        
<asp:Button ID="BShow" runat="server" Text="Show Data" />

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
                        new DataColumn("Name", typeof(string)),
                        new DataColumn("Value",typeof(int)) });
        dt.Rows.Add(1, "aa", 30);
        dt.Rows.Add(2, "bb", 80);
        dt.Rows.Add(3, "cc", 60);
        this.GridView1.DataSource = dt;
        decimal max = dt.Select().Max(c => Convert.ToDecimal(c["Value"]));
        ViewState["Max"] = max;
        this.GridView1.DataBind();
    }
}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        if (e.Row.Cells[2].Text == ViewState["Max"].ToString())
        {
            (e.Row.FindControl("RadioButton1") as RadioButton).Checked = true;
        }
    }
}

ScreenShot:

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Select (Check) RadioButton with Maximum Value in GridView in ASP.Net

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