CODEWITHSUNDEEP
c#.netlistgridview
Pankouri
Pankouri

Reputation: 676

how to populate a list from a asp .net grid view?

I have a Grid View, I want to update all the rows that will be selected by checking the checkbook. First I want all the selected rows into a list. I don know how to do it. I know how to populate a grid from a list. my grid view is

<asp:GridView runat="server" ID="GridForResult" 
        Visible="true" 
        ShowHeader="false"
        AutoGenerateColumns="false">
    <Columns>
        <asp:TemplateField ItemStyle-Width="120px" ItemStyle-Height="22px">
            <ItemTemplate>
                <%#Eval( "TestRoll")%>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField ItemStyle-Width="150px" ItemStyle-Height="22px">
            <ItemTemplate>
                <%#Eval( "Name")%>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField ItemStyle-Width="80px" ItemStyle-Height="22px">
            <ItemTemplate>
                <%#Eval( "Program")%>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField ItemStyle-Width="80px" ItemStyle-Height="22px">
            <ItemTemplate>
                <asp:CheckBox ID="chkSelected" runat="server" Text="Selected" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

My another problem is How to get only the selected (checkboxes) rows from the gridview?

Upvotes: 0

Views: 2726

Answers (4)

codeandcloud
codeandcloud

Reputation: 55200

Its pretty straight forward if you are not paging your grid and you want to maintain checked value on PostBack. On GridView Markup, set DataKeyNames="{your primary key}"

Code - behind

List<string> primaryKeys = new List<string>();
foreach(GridViewRow row in GridForResult.Rows)
{
    CheckBox check = row.FindControl("chkSelected") as CheckBox;
    if(check.Checked)
    {
        primaryKeys.Add(GridForResult.DataKeys[row.RowIndex].Value.ToString());
    }
}

The List<string> primaryKeys will now hold all the checked primary keys.

Upvotes: 1

Bibhu
Bibhu

Reputation: 4081

List<string> objList = new List<string>();        

foreach (GridViewRow gvrow in GridView1.Rows)
{
    CheckBox CheckBox1 = (CheckBox)gvrow.FindControl("CheckBox1");
    if (CheckBox1.Checked)
    {
      objList.Add(row["id"].Text);    
    }
}

Upvotes: 1

Ovais Khatri
Ovais Khatri

Reputation: 3211

declare a collection of say string type,
List<string> objList = new List<string>();

foreach(GridViewRow row in gridViewId)
{
    CheckBox chk = row.FindControl("CheckBoxId") as CheckBox;
    if(chk.IsChecked)
    {
     objList.Add(row["id"].Text);
    }
}
save this list in session,
Session["checkedList"] = objList;

when you want to retireve,use,
objList = List<string>(Session["checkedList"]);

Upvotes: 0

jaywayco
jaywayco

Reputation: 6286

I would make the checkboxes column a TemplateColumn. Then on postback you need to iterate the GridView Rows Collection and do something like this:

foreach(GridViewRow row in gridViewId)
{
    CheckBox chk = row.FindControl("CheckBoxId") as CheckBox;//use chk value as needed
}

Upvotes: 0

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