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Create Grids in Runtime + Asp.net + Cannot get value

Posted on 2010-09-02
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Last Modified: 2013-11-10
Dear EE Members

We are using VS 2008

We have create a grid X, on runtime inside a repeater control, dynamically (on repeaters item databound control), as we donot know the number of columns and rows in X and it is dependent on the data in the database.  

The issue is all works fine, but we have not been able to capture the value of any control bound to the grid on runtime
label, text or otherwise.

How we tried

                   

Object reference error comes when we run it as per above.

Pleae advise
dtStructured = new StructuredBL().InsertStructureRows(dtStructured);
                    GridView gv = (GridView) pnlStructured.FindControl("gv");
                    gv.RowDataBound += new GridViewRowEventHandler(gv_RowDataBound);

                    foreach (DataColumn dc in dtStructured.Columns)
                    {
                        TemplateField tf = new TemplateField();
                        string ctlType = "";
                        if (dc.DataType.Name == "String") { ctlType = "Label"; }
                        else { ctlType = "TextBox"; }
                        tf.HeaderText = dc.ColumnName;
                        tf.FooterStyle.CssClass = dc.Caption;
                        gv.Columns.Add(tf);
                    }
                    gv.DataSource = dtStructured;
                    gv.DataBind();




        void gv_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                for(int i=0; i<e.Row.Cells.Count; i++)
                {
                    HtmlInputText hit = new HtmlInputText();
                    hit.ID = "CTL" + i.ToString();
                    e.Row.Cells[i].Controls.Add(hit);
                }
            }
            //throw new NotImplementedException();
        }





        protected void cmdSaveDraft_Click1(object sender, EventArgs e)
        {
            foreach (RepeaterItem ri in rptFillDataForm.Items)
            {
                    GridView gv = (GridView)ri.FindControl("gv");
                    MyCollection<StructuredValue> myStrValues = new MyCollection<StructuredValue>();
                    StructuredValue strVal;
                    for (int j=0; j<gv.Columns.Count; j++)
                    {
                        for(int row=0; row<gv.Rows.Count; row++)
                        {
                            strVal = new StructuredValue();
                            Control ctl = gv.Rows[row].FindControl("txt"+ gv.Columns[j].HeaderText);
                            if(ctl.GetType().Name != "TextBox") { break; }
                            strVal.ColID = Convert.ToInt32(gv.Columns[j].FooterStyle.CssClass);
                            strVal.RowID = row + 1;
                            strVal.DataFormID = objDataFormIndicator.DataForm.ID;
                            strVal.IndicatorID = objDataFormIndicator.Indicator.ID;
                            strVal.Value = Convert.ToDouble(((TextBox)ctl).Text);	// THIS IS WHERE I AM TRYING TO CAPTURE VALUE FROM TEXTBOX
                            myStrValues.AddItems(strVal);
                        }
                    }
                    int iResult = new StructuredBL().InsertStructuredValues(myStrValues, ((User)Session["CurrentUser"]).ID);

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Question by:mivbinfotech
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Author Comment

by:mivbinfotech
ID: 33585004
To add to this the .text value is still there even after post back, but we cannot use the values of any controls in that grid.
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Accepted Solution

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mivbinfotech earned 0 total points
ID: 33593406
We needed to save the values in a session and then rebind the grid, as controls generated on run time tend to dissappear on Post Back.
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