Youtube API(V3) to fetch all videos on a Channel in ASP.NET

This Blog explains how to retrieve  a specific user’s playlists of videos. This  does not require any user authorization.

YouTube is widely used in our life.  Because simplicity and ease of use, YouTube has become the most popular video sharing and one of the most popular websites in the world. Some YouTube API allows us to get the specific user’s playlists.

To work with YouTube data API, we need to generate the Developer Key by following  the below reference

http://help.dimsemenov.com/kb/wordpress-royalslider-tutorials/wp-how-to-get-youtube-api-key

After generating the Developer key ,Open visual studio and  create ASP.net empty web site

• Add Default Page (Default.aspx):-

Let’s take one text box for channel name which is entered by user. Once  user enter the channel name in text box  and clicked on button after that it will show playlist of video with respect to entered channel name by user.

ASPX  Code :-

User Id:- <asp:TextBox ID=”TextBox1″ runat=”server”></asp:TextBox>

<asp:Button ID=”btn_Search” OnClick=”Button1_Click” runat=”server” Text=”Search” />

<asp:GridView ID=”GridView1″ AutoGenerateColumns=”false” runat=”server”>

<Columns>

<asp:ButtonField Text=”btn_Select” CommandName=”Select” ItemStyle-Width=”150″ />

<asp:TemplateField>

<ItemTemplate>

<a href='<%# “Default2.aspx?ListId=”+Eval(“videoId”) %>’>

<img src='<%# Eval(“ImageUrl”) %>’ alt='<%# Eval(“ImageUrl”) %>’ />

</a>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lbltitle” runat=”server” Text='<%# Eval(“Title”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lbldiscription” runat=”server” Text=’ <%# Eval(“discription”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lblvideoId” runat=”server” Text=’ <%# Eval(“videoId”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lblImageUrl” runat=”server” Text=’ <%# Eval(“ImageUrl”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

</Columns>            </asp:GridView>

 

.CS Code:-

DataTable dt = new System.Data.DataTable();

    protected void Button1_Click(object sender, EventArgs e)

{

dt.Columns.Add(new DataColumn(“Title”, typeof(string)));

dt.Columns.Add(new DataColumn(“discription”, typeof(string)));

dt.Columns.Add(new DataColumn(“videoId”, typeof(string)));

dt.Columns.Add(new DataColumn(“ImageUrl”, typeof(string)));

readplaylist();

GridView1.DataSource = dt;

GridView1.DataBind();

}

 

    public void readplaylist()

{

WebClient wc = new WebClient { Encoding = Encoding.UTF8 };

try

{

string jsonstring = wc.DownloadString(“https://www.googleapis.com/youtube/v3/playlists?part=snippet&key= Developer Key &maxResults=50&channelId=” + CHanelId() + “”);

JObject jobj = (JObject)JsonConvert.DeserializeObject(jsonstring);

foreach (var entry in jobj[“items”])

{                dt.Rows.Add(entry[“snippet”][“title”].ToString(), entry[“snippet”][“description”].ToString(), entry[“id”].ToString(), entry[“snippet”][“thumbnails”][“medium”][“url”].ToString());

}

}        catch (Exception ex)

{

throw;

}

 }

public string CHanelId()

    {

WebClient wc = new WebClient { Encoding = Encoding.UTF8 };

try

{

string jsonstring = wc.DownloadString(“https://www.googleapis.com/youtube/v3/channels?key=Developer Key&forUsername=” + TextBox1.Text + “&part=id”);

JObject jobj = (JObject)JsonConvert.DeserializeObject(jsonstring);

return jobj[“items”][0][“id”].ToString();

}

catch (Exception ex)

{            throw;

}

    }

Enter youtube channel name:-

User will enter youtube video channel name in text box and then click on button.After clicking on button,it will show playlist of video with respect to entered channel name.

Note:- Click on any thumbnail of video play list ,it will  show all videos of that particular clicked play list on next page named as default2.aspx.

• Lets’ Create another page for showing all playlist named as videos.aspx

videos.aspx Page Code

<asp:GridView ID=”GridView1″  AutoGenerateColumns=”false” runat=”server”>

<Columns>

<asp:ButtonField Text=”Select” CommandName=”Select” ItemStyle-Width=”150″ />

<asp:TemplateField>

<ItemTemplate>

<a href='<%# “Default2.aspx?ListId=”+Eval(“videoId”) %>’>

<img src='<%# Eval(“ImageUrl”) %>’ alt='<%# Eval(“ImageUrl”) %>’ />

</a>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lbltitle” runat=”server” Text='<%# Eval(“Title”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lbldiscription” runat=”server” Text=’ <%# Eval(“discription”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lblvideoId” runat=”server” Text=’ <%# Eval(“videoId”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<ItemTemplate>

<asp:Label ID=”lblImageUrl” runat=”server” Text=’ <%# Eval(“ImageUrl”) %>’></asp:Label>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

videos.aspx.CS page code :

protected void Page_Load(object sender, EventArgs e)

{        dt.Columns.Add(new DataColumn(“Title”, typeof(string)));

dt.Columns.Add(new DataColumn(“discription”, typeof(string)));

dt.Columns.Add(new DataColumn(“videoId”, typeof(string)));

dt.Columns.Add(new DataColumn(“ImageUrl”, typeof(string)));

readplaylist(“”);

GridView1.DataSource = dt;

GridView1.DataBind();

}

public void readplaylist(string pageid)

{

if (pageid.Length == 0)

{

WebClient wc = new WebClient { Encoding = Encoding.UTF8 };

try

{

string jsonstring = wc.DownloadString(“https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&playlistId=” + Request.QueryString[“ListId”].ToString().Trim() + “&key=Developer Key &maxResults=50″);

JObject jobj = (JObject)JsonConvert.DeserializeObject(jsonstring);

Label1.Text = jobj[“pageInfo”][“totalResults”].ToString();

foreach (var entry in jobj[“items”])

{

dt.Rows.Add(entry[“snippet”][“title”].ToString(), entry[“snippet”][“description”].ToString(), entry[“snippet”][“resourceId”][“videoId”].ToString(), entry[“snippet”][“thumbnails”][“default”][“url”].ToString());

}

if (jobj[“nextPageToken”] != null && jobj[“nextPageToken”].ToString() != “”)

{

readplaylist(jobj[“nextPageToken”].ToString());

}

}

catch (Exception ex)

{

throw;

}

}

else   {

WebClient wc = new WebClient { Encoding = Encoding.UTF8 };

try

{

string jsonstring = wc.DownloadString(“https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&playlistId=” + Request.QueryString[“ListId”].ToString().Trim() + “&key=Developer key &maxResults=50&pageToken=” + pageid + “”);

JObject jobj = (JObject)JsonConvert.DeserializeObject(jsonstring);

foreach (var entry in jobj[“items”])

{

dt.Rows.Add(entry[“snippet”][“title”].ToString(), entry[“snippet”][“description”].ToString(), entry[“snippet”][“resourceId”][“videoId”].ToString(), entry[“snippet”][“thumbnails”][“default”][“url”].ToString());

}

if (jobj[“nextPageToken”] != null && jobj[“nextPageToken”].ToString() != “”)

{

readplaylist(jobj[“nextPageToken”].ToString());

 

}

}

catch (Exception ex)

{               throw;

}

}

}

 

After clicking  on thumbnail image of playlist in third row of  all play list page as given in above image,it will show all videos of clicked play list as in given below  image.