Input string was not in a correct format. Please help

Question

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)

    {

        this.GridView1.Attributes["style"] = @"opacity:0.4;

                                               filter:alpha(opacity=40);";

////Exception Here

       int index = Convert.ToInt32(e.CommandArgument); 

//////////////////////////////////////////////// I donot why CommandArgument is empty

        if (e.CommandName.ToLower() == "add")

        {

            

            Report.Text=GridView1.Rows[index].Cells[2].Text;

            add_panel.Visible = true;

        }

    }

---

Shival Thakur

Answer 1

How you declare this gridview.

Paste the code you are using to declare this.

 

I suspect you are not setting CommandName property.

Answer 2

You can check with

int index = Convert.ToInt32(e.CommandArgument.ToString()); 

 

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Hasibul Haque,MCC,MCPD blog.e-rains.com

Answer 3

 <asp:GridView ID="GridView1" runat="server" Width="750px" 

            AutoGenerateColumns="False" onrowcommand="GridView1_RowCommand">

        <Columns> 

        <asp:TemplateField HeaderText="Add ID">

        <ItemTemplate>

        <asp:Button Text="Add" runat="server" ID="add" CommandName="ADD" CssClass="button"  CausesValidation="false"  />

           

      

        </ItemTemplate>

        </asp:TemplateField>

        

         <asp:TemplateField HeaderText="Remove ID">

        <ItemTemplate>

        <asp:Button Text="Remove" runat="server" ID="remove" CommandName="remove" CssClass="button" CausesValidation="false" />

        

        </ItemTemplate>

        </asp:TemplateField>

        

       

        <asp:BoundField HeaderText="Report"  DataField="Report_Type" ReadOnly="true"/>

      

        <asp:TemplateField HeaderText="Email To">

        <ItemTemplate>

        <%# Eval("Email_To") %>

        </ItemTemplate>

              

        </asp:TemplateField>

        <asp:BoundField DataField="CC" HeaderText="CC" />

        <asp:BoundField DataField="BCC"  HeaderText="BCC" />

        </Columns>

        <RowStyle CssClass="gvrow" />

        <AlternatingRowStyle CssClass="gridalterrow" />

        <HeaderStyle CssClass="gridheader"/>

        </asp:GridView>

Code Behind

 protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            add_panel.Visible = false;

            connection = new SqlConnection(constr);

            connection.Open();

            adapter = new SqlDataAdapter("select * from Email_Id_Table", connection);

            set = new DataSet();

            adapter.Fill(set);

            connection.Close();

            connection.Dispose();

            GridView1.DataSource = set.Tables[0];

            GridView1.DataBind();

            set.Dispose();

        }

    }

    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)

    {

        this.GridView1.Attributes["style"] = @"opacity:0.4;

                                               filter:alpha(opacity=40);";

      

        if (e.CommandName.ToLower() == "add")

        {

         

            int index = Convert.ToInt32(e.CommandArgument); 

            Report.Text=GridView1.Rows[index].Cells[2].Text;

            add_panel.Visible = true;

        }

    }

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Shival Thakur

Answer 4

CommandArgument is an optional parameter passed to the Command event along with the associated CommandName. The default value is String.Empty.

As you did not set it any where you are getting empty string.

So you should set it as.

<asp:Button Text="Add" runat="server" ID="add" CommandName="ADD" CommandArgument="arguments" CssClass="button"  CausesValidation="false"  />

Answer 5

Thanks......Working Now!!!!

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Shival Thakur