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i am using grid view to show data from the database using c#. i have enabled edit and delete options of the grid view but once i click on the edit or delete button system is showing below error

JavaScript runtime error: '__doPostBack' is undefined

What I have tried:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            DataKeyNames="serial_no" OnPageIndexChanging="GridView1_PageIndexChanging" 
            OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing" 
        <asp:BoundField DataField="serial_no" HeaderText="serial_no" 
            InsertVisible="False" ReadOnly="True" SortExpression="serial_no" />
        <asp:BoundField DataField="internal_receiving" HeaderText="internal_receiving" 
            SortExpression="internal_receiving" />
        <asp:BoundField DataField="date" HeaderText="date" SortExpression="date" />
        <asp:BoundField DataField="department" HeaderText="department" 
            SortExpression="department" />
        <asp:BoundField DataField="department_type" HeaderText="department_type" 
            SortExpression="department_type" />
        <asp:BoundField DataField="organization" HeaderText="organization" 
            SortExpression="organization" />
        <asp:BoundField DataField="organization_type" HeaderText="organization_type" 
            SortExpression="organization_type" />
        <asp:BoundField DataField="file_no" HeaderText="file_no" 
            SortExpression="file_no" />
        <asp:BoundField DataField="subject" HeaderText="subject" 
            SortExpression="subject" />
        <asp:BoundField DataField="file_name" HeaderText="file_name" 
            SortExpression="file_name" />
        <asp:BoundField DataField="status" HeaderText="status" 
            SortExpression="status" />
             <asp:CommandField ShowEditButton="true" />
        <asp:CommandField ShowDeleteButton="true" />


public partial class viewfile : System.Web.UI.Page
    private SqlConnection conn = new SqlConnection("Data Source=.\\sqlexpress;Initial Catalog=college_education;User ID=sa;Password=system;");

    protected void Page_Load(object sender, EventArgs e)
        if (!IsPostBack)

    protected void gvbind()
            SqlCommand cmd = new SqlCommand("Select * from file_rec", conn);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            if (ds.Tables[0].Rows.Count > 0)
                GridView1.DataSource = ds;
                GridView1.DataSource = ds;
                int columncount = GridView1.Rows[0].Cells.Count;
                GridView1.Rows[0].Cells.Add(new TableCell());
                GridView1.Rows[0].Cells[0].ColumnSpan = columncount;
                GridView1.Rows[0].Cells[0].Text = "No Records Found";

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
        Label lbldeleteid = (Label)row.FindControl("lblID");
        SqlCommand cmd = new SqlCommand("delete FROM file_rec where serial_no='" + Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString()) + "'", conn);


    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        GridView1.EditIndex = e.NewEditIndex;
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        int serial_no = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.ToString());
        GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
        Label lblID = (Label)row.FindControl("lblID");
        //TextBox txtname=(TextBox)gr.cell[].control[];
        TextBox textinternal_receiving = (TextBox)row.Cells[0].Controls[0];
        TextBox textdate = (TextBox)row.Cells[1].Controls[0];
        TextBox textdepartment = (TextBox)row.Cells[2].Controls[0];
        TextBox textdepartment_type = (TextBox)row.Cells[3].Controls[0];
        TextBox textorganization = (TextBox)row.Cells[4].Controls[0];
        TextBox textorganization_type = (TextBox)row.Cells[5].Controls[0];
        TextBox textfile_no = (TextBox)row.Cells[6].Controls[0];
        TextBox textsubject = (TextBox)row.Cells[7].Controls[0];
        TextBox textfile_name = (TextBox)row.Cells[8].Controls[0];
        TextBox textstatus = (TextBox)row.Cells[9].Controls[0];
        //TextBox textadd = (TextBox)row.FindControl("txtadd");
        //TextBox textc = (TextBox)row.FindControl("txtc");
        GridView1.EditIndex = -1;
        //SqlCommand cmd = new SqlCommand("SELECT * FROM detail", conn);
        SqlCommand cmd = new SqlCommand("update file_rec set internal_receiving='" + textinternal_receiving + "',date='" + textdate + "',department='" + textdepartment + "',department_type='" + textdepartment_type + "',organization='" + textorganization + "',organization_type='" + textorganization_type + "',file_no='" + textfile_no + "',subject='" + textsubject + "',file_name='" + textfile_name + "',status='" + textstatus + "'where ='" + serial_no + "'", conn);
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
        GridView1.PageIndex = e.NewPageIndex;
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        GridView1.EditIndex = -1;

    protected void Button1_Click(object sender, EventArgs e)
Updated 1-Feb-17 21:19pm
[no name] 1-Feb-17 11:34am
"JavaScript runtime error:", other than the SQL injection attack invitation I do not see a single bit of javascript anywhere in your posting. But I didn't go through your unformatted code dump very carefully
Member 12950401 1-Feb-17 11:39am
i have not used java script in the code but i dont know why this error is shown
Richard Deeming 1-Feb-17 14:02pm
Are you running on .NET 2.0 or 4.0? There was a bug with the browser definition files which was fixed in 2011, but you might be missing the patch:
Bug and Fix: ASP.NET fails to detect IE10 causing _doPostBack is undefined JavaScript error or maintain FF5 scrollbar position[^]

As mentioned in the comments, setting Page.ClientTarget = "uplevel" in the Page_Init event would also avoid this bug.
Member 12950401 1-Feb-17 21:14pm
i am using VS2010, V4.0
Bryian Tan 1-Feb-17 23:30pm
Since you guy mention SQL injection. I want to throw in another example. Hopefully it will help to understand how SQL injection works.


1 solution

The Form that displays this view in must have runat="server" declared. In the case that you have this added and are still not seeing the reference, add the following to your page load method, ClientScriptManager.GetPostBackEventReference.
Member 12950401 2-Feb-17 9:14am
where exactly i should put this...

ClientScriptManager.GetPostBackEventReference is showing below error.

"only assigments , call,increment decrement and new object expressions can be used as a statement "
Pete O'Hanlon 2-Feb-17 10:11am
That's because you're missing a (); off the end. I just put the call you'd need - I didn't think I'd have to spell it out exactly.
Member 12950401 22-Mar-17 22:06pm
Sir i am still not able to solve the problem.

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