Dot Net Examples

DataViewAllowEditProperty.aspx

    <%@ Page Language="C#" AutoEventWireup="true" %>
    <%@ Import Namespace="System.Data" %>

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <script runat="server">
        protected void Button1_Click(object sender, System.EventArgs e)
        {
            DataTable dt = new DataTable();
            dt.TableName = "Books";

            DataColumn dc1 = new DataColumn();
            dc1.ColumnName = "BookID";
            dc1.DataType = typeof(int);
            dc1.AllowDBNull = false;
            dc1.Unique = true;

            DataColumn dc2 = new DataColumn();
            dc2.ColumnName = "Category";
            dc2.DataType = typeof(string);

            DataColumn dc3 = new DataColumn();
            dc3.ColumnName = "BookName";
            dc3.DataType = typeof(string);

            DataColumn dc4 = new DataColumn();
            dc4.ColumnName = "Author";
            dc4.DataType = typeof(string);

            dt.Columns.AddRange(new DataColumn[] { dc1, dc2, dc3, dc4 });

            dt.Rows.Add(new object[] { 1, ".NET", "ASP.NET 3.5 Application Architecture and Design", "Vivek Thakur" });
            dt.Rows.Add(new object[] { 2, "Games", "Cocos2d for iPhone 0.99 Beginner's Guide", "Pablo Ruiz" });
            dt.AcceptChanges();

            GridView1.DataSource = dt.DefaultView;
            GridView1.DataBind();

            //this line create a new DataView
            DataView dView = new DataView(dt);
            dView.Sort = "BookName DESC" ;

            Label1.Text = "Here we create a new DataView<br />" +
                          "and set the sort order (BookName DESC)";

            GridView2.DataSource = dView;
            GridView2.DataBind();

            dView.AllowEdit = true;
            //this line edit a row in DataView which index is 0
            dView[0]["Category"] = ".NET";
            dView[0]["BookName"] = "Microsoft Windows Workflow Foundation 4.0 Cookbook";
            dView[0]["Author"] = "Andrew Zhu ";

            Label2.Text = "Here we edit a row in DataView, Now the DataView is...";
            GridView3.DataSource = dView;
            GridView3.DataBind();

            Label3.Text = "Now the source DataTable is...";
            GridView4.DataSource = dt;
            GridView4.DataBind();
        }
    </script>

    <html xmlns="http://www.w3.org/1999/xhtml">
    <head id="Head1" runat="server">
        <title>Using AllowEdit property - how to edit update row in a DataView in ado.net</title>
    </head>
    <body>
        <form id="form1" runat="server">
        <div>
            <h2 style="color:DarkBlue; font-style:italic;">
                Using AllowEdit property - how to
                <br /> edit update row in a DataView in ado.net
            </h2>
            <hr width="450" align="left" color="CornFlowerBlue" />
            <asp:GridView
                ID="GridView1"
                runat="server"
                BorderColor="Snow"
                ForeColor="Snow"
                Width="700"
                Font-Names="Courier"
                >
                <HeaderStyle BackColor="DarkMagenta" Height="30" />
                <RowStyle BackColor="DarkKhaki" />
                <AlternatingRowStyle BackColor="DarkOliveGreen" />
            </asp:GridView>
            <asp:Label
                 ID="Label1"
                 runat="server"
                 Font-Size="Large"
                 ForeColor="DodgerBlue"
                 Font-Italic="true"
                 >
            </asp:Label>
            <asp:GridView
                ID="GridView2"
                runat="server"
                BorderColor="Snow"
                ForeColor="Snow"
                Width="700"
                Font-Names="Courier"
                >
                <HeaderStyle BackColor="Maroon" Height="30" />
                <RowStyle BackColor="DarkKhaki" />
                <AlternatingRowStyle BackColor="DarkOliveGreen" />
            </asp:GridView>
            <asp:Label
                 ID="Label2"
                 runat="server"
                 Font-Size="Large"
                 ForeColor="DodgerBlue"
                 Font-Italic="true"
                 >
            </asp:Label>
            <asp:GridView
                ID="GridView3"
                runat="server"
                BorderColor="Snow"
                ForeColor="Snow"
                Width="700"
                Font-Names="Courier"
                >
                <HeaderStyle BackColor="Maroon" Height="30" />
                <RowStyle BackColor="DarkKhaki" />
                <AlternatingRowStyle BackColor="DarkOliveGreen" />
            </asp:GridView>
            <asp:Label
                 ID="Label3"
                 runat="server"
                 Font-Size="Large"
                 ForeColor="DodgerBlue"
                 Font-Italic="true"
                 >
            </asp:Label>
            <asp:GridView
                ID="GridView4"
                runat="server"
                BorderColor="Snow"
                ForeColor="Snow"
                Width="700"
                Font-Names="Courier"
                >
                <HeaderStyle BackColor="DarkMagenta" Height="30" />
                <RowStyle BackColor="DarkKhaki" />
                <AlternatingRowStyle BackColor="DarkOliveGreen" />
            </asp:GridView>
            <asp:Button
                ID="Button1"
                runat="server"
                OnClick="Button1_Click"
                Text="Populate GridView"
                Height="45"
                Font-Bold="true"
                ForeColor="DodgerBlue"
                />
        </div>
        </form>
    </body>
    </html>

DataViewToTableMethod.aspx

<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System.Data" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
DataTable dt = new DataTable();
dt.TableName = "Books";

DataColumn dc1 = new DataColumn();
dc1.ColumnName = "BookID";
dc1.DataType = typeof(int);
dc1.AllowDBNull = false;
dc1.Unique = true;

DataColumn dc2 = new DataColumn();
dc2.ColumnName = "Category";
dc2.DataType = typeof(string);

DataColumn dc3 = new DataColumn();
dc3.ColumnName = "BookName";
dc3.DataType = typeof(string);

DataColumn dc4 = new DataColumn();
dc4.ColumnName = "Author";
dc4.DataType = typeof(string);

dt.Columns.AddRange(new DataColumn[] { dc1, dc2, dc3, dc4 });

dt.Rows.Add(new object[] { 1, "iPhone", "iPhone User Interface Cookbook: RAW", "Cameron Banga" });
dt.Rows.Add(new object[] { 2, "MySQL", "MySQL 5.1 Plugin Development", "Andrew Hutchings, Sergei Golubchik" });
dt.Rows.Add(new object[] { 3, "MySQL", "MySQL Admin Cookbook", "Daniel Schneller, Udo Schwedt" });
dt.AcceptChanges();

Label1.Text = "Source DataTable";
GridView1.DataSource = dt.DefaultView;
GridView1.DataBind();

//this line create a new DataView
DataView dView = new DataView(dt);
dView.RowFilter = "Category = 'MySQL'";

Label2.Text = "Here we create a new DataView<br />" +
"and set the RowFilter (Category = 'MySQL')";

GridView2.DataSource = dView;
GridView2.DataBind();

//this line create a new DataTable from DataView
DataTable dt2 = dView.ToTable();

Label3.Text = "Here we create a new DataTable from DataView";
GridView3.DataSource = dt2;
GridView3.DataBind();
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>How to use DataView ToTable method to create a new DataTable in ado.net</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:DarkBlue; font-style:italic;">
How to use DataView ToTable method
<br /> to create a new DataTable in ado.net
</h2>
<hr width="450" align="left" color="CornFlowerBlue" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="Large"
ForeColor="DodgerBlue"
Font-Italic="true"
>
</asp:Label>
<asp:GridView
ID="GridView1"
runat="server"
BorderColor="Snow"
ForeColor="Snow"
Width="600"
Font-Names="Courier"
>
<HeaderStyle BackColor="DarkSlateBlue" Height="30" />
<RowStyle BackColor="MediumVioletRed" />
<AlternatingRowStyle BackColor="PaleVioletRed" />
</asp:GridView>
<br />
<asp:Label
ID="Label2"
runat="server"
Font-Size="Large"
ForeColor="DodgerBlue"
Font-Italic="true"
>
</asp:Label>
<asp:GridView
ID="GridView2"
runat="server"
BorderColor="Snow"
ForeColor="Snow"
Width="600"
Font-Names="Courier"
>
<HeaderStyle BackColor="DarkSlateBlue" Height="30" />
<RowStyle BackColor="MediumVioletRed" />
<AlternatingRowStyle BackColor="PaleVioletRed" />
</asp:GridView>
<br />
<asp:Label
ID="Label3"
runat="server"
Font-Size="Large"
ForeColor="DodgerBlue"
Font-Italic="true"
>
</asp:Label>
<asp:GridView
ID="GridView3"
runat="server"
BorderColor="Snow"
ForeColor="Snow"
Width="600"
Font-Names="Courier"
>
<HeaderStyle BackColor="DarkSlateBlue" Height="30" />
<RowStyle BackColor="MediumVioletRed" />
<AlternatingRowStyle BackColor="PaleVioletRed" />
</asp:GridView>
<asp:Button
ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Populate GridView"
Height="45"
Font-Bold="true"
ForeColor="DodgerBlue"
/>
</div>
</form>
</body>
</html>

Dot Net Examples

Wednesday, July 6, 2011

AllowEdit property

Sunday, May 15, 2011

DataView ToTable method to create a new DataTable in ado.net