How to add generic class value to Gridview in asp.net web application

Question

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Hi,
I am new to web application developement using asp.net.I want save generic class data in gridview.I have web form including several controls and button . When user click on ADD button then all controls value stoared in class ,then class value is stoared in gridview.I got Only empty gridview structure.

Plz check the following code.

Repeater.cs

C#

public class RepeaterData
 {
     public int ino;
     public string iname;
     public string val1;
     public string val2;
     public string val3;
     public string val4;
     public string tot;
     public int INo
     {

         get { return ino;}
         set { ino = value; }
     }
     public string IName
     {
         get { return iname; }
         set { iname = value; }
     }
     public string Val1
     {
         get { return val1; }
         set { val1 = value; }
     }
     public string Val2
     {
         get { return val2; }
         set { val2 = value; }
     }
      public string Val3
     {
         get { return val3; }
         set { val3 = value; }
     }

      public string Val4
      {
          get { return val4; }
          set { val4 = value; }
      }
      public string Total
      {
          get { return tot; }
          set { tot = value; }
      }

 }

Default.aspx

HTML

<div style="border-style: none; border-color: inherit; border-width: 1px; height:174px; width:796px; padding-removed100PX">
     <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            CellSpacing="5" Width="787px">
         <Columns>
             <asp:BoundField HeaderText="Item No"/>
             <asp:BoundField HeaderText="Item Name" />
             <asp:BoundField HeaderText="Value1" />
             <asp:BoundField HeaderText="Value2" />
             <asp:BoundField HeaderText="Value3" />
             <asp:BoundField HeaderText="Value4" />
             <asp:BoundField HeaderText="Total" />
         </Columns>
        </asp:GridView>
    </div>

Default.aspx.cs

C#

List<RepeaterData> itemDetails = new List<RepeaterData>();

 protected void BtnAdd_Click(object sender, EventArgs e)
        {
          

            itemDetails = GetItemDetails();
            GridView1.DataSource = itemDetails;
            GridView1.DataBind();
            //TextBox2.Text = GridView1.Rows[0].Cells[1].Text;
        }
 protected List<RepeaterData> GetItemDetails()
        {
        
                    RepeaterData data = new RepeaterData();
                    data.INo = Convert.ToInt32(ItemNoList.Text);
                    data.IName = ItemNameList.Text;
                    data.Val1 = TxtVal1.Text;
                    data.Val2 = TxtVal2.Text;
                    data.Val3 = TxtVal3.Text;
                    data.Val4 = TxtVal4.Text;
                    data.Total = TxtTotal.Text;
                    //TextBox2.Text = data.Total;
           
                    itemDetails.Add(data);
              
            return itemDetails;
        }

I got only empty griedview.
Please help me to solve problem.

Thanx

Posted 30-Oct-15 21:08pm

SujataJK

Updated 31-Oct-15 10:14am

Maciej Los

v2

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Comments

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 31-Oct-15 4:47am

But where did you provide the data to the properties and bind to the grid?

SujataJK 31-Oct-15 5:46am

In Default.aspx.cs
like
List<repeaterdata> itemDetails = new List<repeaterdata>();

protected void BtnAdd_Click(object sender, EventArgs e)
{

itemDetails = GetItemDetails();
GridView1.DataSource = itemDetails;
GridView1.DataBind();

}

protected List<repeaterdata> GetItemDetails()
{
RepeaterData data = new RepeaterData();
data.INo = Convert.ToInt32(ItemNoList.Text);
data.IName = ItemNameList.Text;
data.Val1 = TxtVal1.Text;
data.Val2 = TxtVal2.Text;
data.Val3 = TxtVal3.Text;
data.Val4 = TxtVal4.Text;
data.Total = TxtTotal.Text;

itemDetails.Add(data);
con.Close();
return itemDetails;
}

}

SujataJK 31-Oct-15 5:48am

List is declared like that
List<repeaterdata> itemDetails=new List<repeaterdata>();

Sergey Alexandrovich Kryukov 31-Oct-15 6:24am

You don't have "generic class data". Any class instance is always an instance of a complete class, not generic.
Say, System.Collections.Generic.List<> is a generic type, but System.Collections.Generic.List<system.string> is a complete class, not generic. So, generics are unrelated to the question. Besides, you did not show us any.
—SA

SujataJK 31-Oct-15 7:00am

thanx

SujataJK 31-Oct-15 7:02am

but here i decalred list of class type means List<> itemDetails=new list<>()
Here List is of RepeaterData Class Type

Sergey Alexandrovich Kryukov 31-Oct-15 20:14pm

My point is: this is not a generic class, this is a complete class obtaining by substitution of actual (concrete) type parameter for a generic parameter. At the point where you instantiate a complete class this way and get a complete class, all generic-specific aspects become irrelevant.
—SA

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Maciej Los · Accepted Answer · 2015-10-31T10:29:00

Solution 1

Problem is here:

XML

<asp:BoundField HeaderText="Item No"/>
<asp:BoundField HeaderText="Item Name" />

You use 'Item No' and 'Item Name' names to define headers. But in your (NOT-generic) class, you have only INo and IName. What it means? You have to define datafields to bind. See: BoundField Class[^]

XML

<asp:BoundField HeaderText="Item No" datafield="INo"/>
<asp:BoundField HeaderText="Item Name" datafield="IName" />

Do not forget to define other properties/fields.

Posted 31-Oct-15 10:29am

Maciej Los

Comments

Sergey Alexandrovich Kryukov 31-Oct-15 20:15pm

5ed.
—SA

Maciej Los 1-Nov-15 3:41am

Thank you, Sergey.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 1-Nov-15 1:46am

Perfect 5. :)

Maciej Los 1-Nov-15 3:41am

Thank you, Tadit.

SujataJK 5-Nov-15 4:05am

Thanx @Maciej Los It's Really helpful for me.

Maciej Los 5-Nov-15 5:00am

You're very welcome.