How can I display data in the gridview in webform with httpclient ?

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the problem the grid view is not visible in the browser.and observe the c# code for displaying data in gridview what are the modifications i have to do to dsiplay the data.

What I have tried:

HttpClient client = new HttpClient();
           client.BaseAddress = new Uri(Base_URL);
           client.DefaultRequestHeaders.Accept.Clear();
           client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
           StringContent con = new StringContent(JsonConvert.SerializeObject(up), Encoding.UTF8, "application/json");
           HttpResponseMessage response = await client.GetAsync("api/UpdateHotelInfoes"+TextBox2.Text);

           if (response.IsSuccessStatusCode)
           {
               string data = await response.Content.ReadAsStringAsync();
              //var  A= JsonConvert.DeserializeObject<UpdateHotelInfo>(data);
               // List<UpdateHotelInfo> a = response.Content.ReadAsAsync<List<UpdateHotelInfo>>().Result;
               var result = JsonConvert.DeserializeObject<List<UpdateHotelInfo>>(data);
               GridView1.DataSource = result;

below is aspx code

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns = "False" BackColor="White" BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px" CellPadding="4" ForeColor="Black" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
           <AlternatingRowStyle BackColor="White" />
           <Columns>
               <asp:BoundField DataField="HOTEL_NAME" HeaderText="HOTEL_NAME" />
               <asp:BoundField DataField="ADDRESS_LINE" HeaderText="ADDRESS_LINE" />
               <asp:BoundField DataField="AREA" HeaderText="AREA" />
               <asp:BoundField DataField="CITY" HeaderText="CITY" />
               <asp:BoundField DataField="POSTAL_CODE" HeaderText="POSTAL_CODE" />
               <asp:BoundField DataField="STATE" HeaderText="STATE" />
               <asp:BoundField DataField="COUNTRY" HeaderText="COUNTRY" />
               <asp:BoundField DataField="PHONE_NUMBER" HeaderText="PHONE_NUMBER" />
               <asp:BoundField DataField="LANDLINE" HeaderText="LANDLINE" />
               <asp:BoundField DataField="EMAIL_ID" HeaderText="EMAIL_ID" />
               <asp:BoundField DataField="WEBSITE" HeaderText="WEBSITE" />
               <asp:BoundField DataField="PROPERTY_TYPE" HeaderText="PROPERTY_TYPE" />
               <asp:BoundField DataField="PROPERTY_GRADE" HeaderText="PROPERTY_GRADE" />
               <asp:BoundField DataField="REGISTRATION" HeaderText="REGISTRATION" />
           </Columns>
           <FooterStyle BackColor="#CCCC99" />
           <HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />
           <PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />
           <RowStyle BackColor="#F7F7DE" />
           <SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />
           <SortedAscendingCellStyle BackColor="#FBFBF2" />
           <SortedAscendingHeaderStyle BackColor="#848384" />
           <SortedDescendingCellStyle BackColor="#EAEAD3" />
           <SortedDescendingHeaderStyle BackColor="#575357" />
       </asp:GridView>

Posted 10-May-17 23:18pm

saimanisha

Updated 14-May-17 1:19am

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Comments

F-ES Sitecore 11-May-17 6:13am

We don't have access to your data sources so how can we possibly know what the problem is? You'll need to use the debugger to step through your code and examine the variables and data to work out what is going wrong. Chances are "response.IsSuccessStatusCode" is false, which could be due to the url you are accessing.

"api/UpdateHotelInfoes"+TextBox2.Text

if TextBox2 has "Hello" then you are calling

api/UpdateHotelInfoesHello

which is probably wrong.

saimanisha 11-May-17 6:24am

later i mentioned "/" but also its not working.

shreyal acharya 11-May-17 6:15am

Check this link For your Problem

http://aspnettutorials.com/tutorials/database/add-data-to-gridview-from-multiple-tables-in-asp-net-4-0-and-c/

saimanisha 11-May-17 6:28am

public class UpdateHotelInfoesController : ApiController
{
private UpdateHotelInfoEntities db = new UpdateHotelInfoEntities();

// GET: api/UpdateHotelInfoes
public IQueryable<updatehotelinfo> GetUpdateHotelInfo()
{
return db.UpdateHotelInfo;
}

// GET: api/UpdateHotelInfoes/5
[ResponseType(typeof(UpdateHotelInfo))]
public IHttpActionResult GetUpdateHotelInfo(int id)
{
UpdateHotelInfo updateHotelInfo = db.UpdateHotelInfo.Find(id);
if (updateHotelInfo == null)
{
return NotFound();
}

return Ok(updateHotelInfo);
}

this is the api code using entity framework ..put delete and update methods are working but am unable display the data ..the request to api is working fine..but how can i display the respose into the gridview.

F-ES Sitecore 11-May-17 6:43am

Your update method doesn't return data. If the update has succeeded then you need to call another method that returns the hotel data.

Bryian Tan 11-May-17 23:05pm

Do the code has GridView1.DataBind(); ?

saimanisha 12-May-17 0:50am

yeah its there but the problem is here after if condition
if (response.IsSuccessStatusCode)

iam getting exceptions like json format can't converted to json array.if i write code like this
var h = await response.Content.ReadAsAsync<IEnumerable<updatehotelinfo>>()
up = JsonConvert.DeserializeObject<updatehotelinfo>(h);
GridView1.DataSource = up;
GridView1.DataBind();
Response.Write("alert('Data loaded successfully');");
}

i want to displayis wrong here..iam not understanding where do i change the code..

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ziad imad · Answer 1 · 2017-05-14T01:19:00

Solution 1

Hi u need to add

GridView1.DataBind();

at the end of your code

Posted 14-May-17 1:19am

ziad imad

Updated 14-May-17 1:20am

v2

Comments

saimanisha 15-May-17 2:12am

i added already , but also its not working