Hi ,

I not able to find control from webdata through FindControl() method and below is the code.

protected void BtnUpdate_Click(object sender, EventArgs e)
{

if (this.wbDatGrid.Rows.Count > 0)
{
foreach (GridRecord row in wbDatGrid.Rows)
{
DropDownList cmbAccess = new DropDownList();
cmbAccess = (DropDownList)row.Items.FindItemByKey("cmbAccess"); // Get Error

SaveDatInBD(ID, cmbAccess.SelectedValue);

}

}
}

--------------------------------------------------- FULL CODE -------------------

-- ASPX Code
----------------
<%@ register="" assembly="Infragistics45.Web.v16.2, Version=16.2.20162.2013, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.GridControls" tagprefix="ig">
<%@ register="" assembly="Infragistics45.Web.v16.2, Version=16.2.20162.2013, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.LayoutControls" tagprefix="cc1">

OnInitializeRow="wbData_InitializeRow" EnableAjax="true" EnableDataViewState="true"
OnItemCommand="wbData_ItemCommand">

-- ASPX CS Code
----------------
protected void Page_Load(object sender, EventArgs e)
{
BindGrid();

if (IsPostBack)
{

this.wbData.EnsureTemplates();
}
}

public void BindGrid();
{
GenericHelper.ParseXML("PageTemplate", ref this.wbData);

this.wbData.DataSource = GetDataFromDB();
this.wbData.DataBind();
}

protected void wbData_InitializeRow(object sender, RowEventArgs e)
{
GridRecordItem gric = e.Row.Items[0];

string gridID = (gric.Record).Items[0].Value.ToString();
string clsID = (gric.Record).Items[2].Value.ToString();

List clsList = GetDropdoenValue();
e.Row.Items[3].Template = new DropDownCustomItemTemplate()
{
ID = "cmbAccess",
RowIndex = e.Row.Index.ToString(),
DTdatasource = clsList,
DdlDataTextField = "Name",
DdlDataValueField = "Id",
DdlSelectedValue = clsID;
};

e.Row.Items[4].Template = new DeleteCustomItemTemplate() { ID = "Remove", CommandArg = gridID, RowIndex = e.Row.Index.ToString() };
}

protected void BtnUpdate_Click(object sender, EventArgs e)
{

if (this.wbDatGrid.Rows.Count > 0)
{
foreach (GridRecord row in wbDatGrid.Rows)
{
DropDownList cmbAccess = new DropDownList();
cmbAccess = (DropDownList)row.Items.FindItemByKey("cmbAccess"); // Get Error

SaveDatInBD(ID, cmbAccess.SelectedValue);

}

}
}

-------------- Tempalte
public class CustomItemTemplate : ITemplate
{
public string ID { get; set; }
public string RowIndex { get; set; }
public string CommandArg { get; set; }

public CustomItemTemplate() {}

public CustomItemTemplate(string _Id, string _rowIndex, string _commandArg)
{
this.ID = _Id;
this.RowIndex = _rowIndex;
this.CommandArg = _commandArg;
}

public virtual void InstantiateIn(Control container)
{}
}

public class EditCustomItemTemplate : CustomItemTemplate
{
public EditCustomItemTemplate() {}

public EditCustomItemTemplate(string _Id, string _rowIndex, string _commandArg)
{
this.ID = _Id;
this.RowIndex = _rowIndex;
this.CommandArg = _commandArg;
}

public override void InstantiateIn(Control container)
{
ImageButton imgBtn = new ImageButton();
imgBtn.ID = ID;
imgBtn.ID = "imgEdit";
imgBtn.EnableViewState = false;
imgBtn.CommandArgument = CommandArg;
imgBtn.CommandName = "Edit";
imgBtn.ViewStateMode = ViewStateMode.Enabled;
imgBtn.ImageUrl = GenericGridConstants.CONTROL_EDITIMAGE;
container.Controls.Add(imgBtn);
}

}

public class DeleteCustomItemTemplate : CustomItemTemplate
{

public DeleteCustomItemTemplate() { }

public DeleteCustomItemTemplate(string _Id, string _rowIndex, string _commandArg)
{
this.ID = _Id;
this.RowIndex = _rowIndex;
this.CommandArg = _commandArg;
}

public override void InstantiateIn(Control container)
{
ImageButton imgDelete = new ImageButton();
imgDelete.ID = ID;
imgDelete.EnableViewState = false;
imgDelete.CommandArgument = CommandArg;
imgDelete.CommandName = "Remove";
//p.Click += p_Click;
imgDelete.ViewStateMode = ViewStateMode.Enabled;
imgDelete.ImageUrl = GenericGridConstants.CONTROL_REMOVEIMAGE;
imgDelete.OnClientClick = "return confirm('Are you sure you want to delete this record ?');";
//p.OnClientClick = "confirm ('Are you sure you want to delete this record ?');";
container.Controls.Add(imgDelete);

}
}

public class DropDownCustomItemTemplate : CustomItemTemplate
{
public DataTable DTdatasource { get; set; }
public string DdlSelectedValue { get; set; }
public string DdlDataValueField { get; set; }
public string DdlDataTextField { get; set; }

public DropDownCustomItemTemplate() { }

public DropDownCustomItemTemplate(string _Id, string _rowIndex, string _commandArg, DataTable _DTdatasource, string _DdlDataValueField, string _DdlDataTextField)
{
this.ID = _Id;
this.RowIndex = _rowIndex;
this.CommandArg = _commandArg;
this.DTdatasource = _DTdatasource;
this.DdlDataValueField = _DdlDataValueField;
this.DdlDataTextField = _DdlDataTextField;
}

public override void InstantiateIn(Control container)
{
DropDownList ddl = new DropDownList();
ddl.ID = ID;
ddl.ID = "imgEdit";
ddl.DataSource = DTdatasource;
ddl.DataTextField = DdlDataTextField;
ddl.DataValueField = DdlDataValueField;
ddl.DataBind();
ddl.SelectedValue = DdlSelectedValue;
ddl.EnableViewState = false;
ddl.ViewStateMode = ViewStateMode.Enabled;
container.Controls.Add(ddl);
}

}

-------- ------
public class Helper
{

public static void ParseXML(string formID, ref WebDataGrid WebDataGrid1)
{
//if (WebDataGrid1.HasColumns == false)
if (WebDataGrid1.Columns.Count < 3)
{
WebDataGrid1.AutoGenerateColumns = false;
XmlDocument xmlDoc = new XmlDocument();

xmlDoc.Load(GenericGridConstants.XML_TEMPLATE_PATH);

#region Grid Level Settings

//Set Grid Height.
WebDataGrid1.Height = Unit.Parse(xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes[GenericGridConstants.ATTRIBUTES_HEIGHT].Value.ToString().Trim());

//Set Grid Width.
WebDataGrid1.Width = Unit.Parse(xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes[GenericGridConstants.ATTRIBUTES_WIDTH].Value.ToString().Trim());

//Check if Sorting is enabled or no.
if (Convert.ToBoolean(xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes[GenericGridConstants.ATTRIBUTES_ALLOWSORTING].Value.ToString().Trim()) == true)
{
WebDataGrid1.Behaviors.CreateBehavior();
}

//Check if Export functionality is required or not.
//if (Convert.ToBoolean(xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes[GenericGridConstants.ATTRIBUTES_EXPORT].Value.ToString().Trim()) == true)
// btnExportToExcel.Visible = true;
//else
// btnExportToExcel.Visible = false;

//check if paging is required or not.
if (Convert.ToBoolean(xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes[GenericGridConstants.ATTRIBUTES_ALLOWPAGING].Value.ToString().Trim()) == true)
{
WebDataGrid1.Behaviors.CreateBehavior();
//Set the page size.
WebDataGrid1.Behaviors.Paging.PageSize = Convert.ToInt32(xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes[GenericGridConstants.ATTRIBUTES_PAGESIZE].Value.ToString().Trim());
WebDataGrid1.Behaviors.Paging.PagerMode = Infragistics.Web.UI.GridControls.PagerMode.NumericFirstLast;
}

//Get the KeyDataField
//Priya to uncomment afterwards. This will be used while we are working on Editable Grids.
//string KeyDataField = xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes[GenericGridConstants.ATTRIBUTES_KEYDATAFIELD].Value.ToString().Trim() != "NULL" ? xmlDoc.DocumentElement.SelectSingleNode("//form[@ID='" + formID + "']/GridName").Attributes["KeyDataField"].Value.ToString().Trim() : string.Empty;
//if (KeyDataField != "NULL")
//{
// this.WebDataGrid1.DataKeyFields = KeyDataField;
//}

#endregion Grid Level Settings

#region Column Settings

XmlNodeList ColList = xmlDoc.DocumentElement.SelectNodes("//form[@ID='" + formID + "']/GridName/Columns/Col");

foreach (XmlNode node in ColList)
{

switch (node.Attributes[GenericGridConstants.ATTRIBUTES_TYPEOFCOL].Value.ToString().ToUpper().Trim())
{

case GenericGridConstants.CONTROL_LABEL:
case GenericGridConstants.CONTROL_TEXTBOX:
Infragistics.Web.UI.GridControls.BoundDataField f = new Infragistics.Web.UI.GridControls.BoundDataField();
f.Key = node.Attributes[GenericGridConstants.ATTRIBUTES_KEY].Value;
f.Header.Text = node.InnerText;
WebDataGrid1.Columns.Add(f, true);
break;

case GenericGridConstants.CONTROL_CHECKBOX:
BoundCheckBoxField chk1 = new BoundCheckBoxField();
chk1.Key = node.Attributes[GenericGridConstants.ATTRIBUTES_KEY].Value;
chk1.Header.Text = node.InnerText;
chk1.CheckBox.CheckedImageUrl = "..\\ig_res\\Default\\images\\ig_checkbox_on.gif";
chk1.CheckBox.UncheckedImageUrl = "..\\ig_res\\Default\\images\\ig_checkbox_off.gif";
chk1.CheckBox.PartialImageUrl = "..\\ig_res\\Default\\images\\ig_checkbox_partial.gif";
WebDataGrid1.Columns.Add(chk1);
break;

case GenericGridConstants.CONTROL_RADIOBUTTON:
//TemplateDataField tdl = new TemplateDataField();
//tdl.Key = node.Attributes["Key"].Value;
//tdl.Header.Text = node.InnerText;
//RadioButton radbtn = new RadioButton();
//radbtn.GroupName = node.Attributes["Key"].Value;
//tdl.ItemTemplate = ITemplatedGridObject obj;
//obj.TemplateContainer.Controls.Add(radbtn);
break;

case GenericGridConstants.CONTROL_IMAGE:
case GenericGridConstants.CONTROL_LINKBUTTON:
UnboundField img = new UnboundField();
img.Key = node.Attributes[GenericGridConstants.ATTRIBUTES_KEY].Value;
img.Header.Text = node.InnerText;
img.HtmlEncode = false;
WebDataGrid1.Columns.Add(img, true);
break;
}//Switch Case ends

#region Common Column Properties

//check if the column is hidden.
if (node.Attributes[GenericGridConstants.ATTRIBUTES_HIDDEN].Value.ToString().Trim() == "true")
{
WebDataGrid1.Columns[node.Attributes[GenericGridConstants.ATTRIBUTES_KEY].Value].Hidden = true;
}

//Set width to Columns.
WebDataGrid1.Columns[node.Attributes[GenericGridConstants.ATTRIBUTES_KEY].Value].Width = Unit.Parse(node.Attributes[GenericGridConstants.ATTRIBUTES_COLWIDTH].Value.ToString());

//Add Editing behavior to the Grid by default. Then depending on the isEditable flag from XML Template set/reset the editing behavior
WebDataGrid1.Behaviors.CreateBehavior();
WebDataGrid1.Behaviors.EditingCore.Behaviors.CreateBehavior();
// Create column settings
EditingColumnSetting settingColumn1 = new EditingColumnSetting();
settingColumn1.ColumnKey = node.Attributes[GenericGridConstants.ATTRIBUTES_KEY].Value;

//Check if column is Editable. If yes enable the editing behavior.
if (Convert.ToBoolean(node.Attributes[GenericGridConstants.ATTRIBUTES_ISEDITABLE].Value.ToString().Trim()) == true)
{
settingColumn1.ReadOnly = false;
WebDataGrid1.Behaviors.EditingCore.Behaviors.CellEditing.ColumnSettings.Add(settingColumn1);
}
else
{
settingColumn1.ReadOnly = true;
WebDataGrid1.Behaviors.EditingCore.Behaviors.CellEditing.ColumnSettings.Add(settingColumn1);
}

#endregion Common Column Properties

}//Foreach loop ends

#endregion Column Settings
}
}

}

Thansk,

Santosh.