Grid view row updating does not get new entered values - asp.net

Question

I have used below code for GridViewRowUpdating, but after click on update button, it takes old values.
I checked by break point for GridViewRowIpdating, and all the text boxes have old values. And new entered values do not grab.
I tried a lot in google but I could not solve the problem.
protected void GridViewDocuments_Search_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
_DataContext = new EDMSDataContext();
int _Docid = (int)GridViewDocuments_Search.DataKeys[e.RowIndex].Value;
TextBox DocumentNo = (TextBox)GridViewDocuments_Search.Rows[e.RowIndex].FindControl("DocumentNo");
TextBox title = (TextBox)GridViewDocuments_Search.Rows[e.RowIndex].FindControl("title");
TextBox unit = (TextBox)GridViewDocuments_Search.Rows[e.RowIndex].FindControl("unit");
TextBox originator = (TextBox)GridViewDocuments_Search.Rows[e.RowIndex].FindControl("originator");
_DataContext.updateDoc(_Docid, DocumentNo.Text, title.Text, unit.Text, originator.Text);
_DataContext.SubmitChanges();
GridViewDocuments_Search.EditIndex = -1;
var query = _DataContext.spQuickSearchDoc(txtSearchKeywords.Text);
GridViewDocuments_Search.DataSource = query;
GridViewDocuments_Search.DataBind();
}
protected void GridViewDocuments_Search_RowEditing(object sender, GridViewEditEventArgs e)
{
//var query = _DataContext.spQuickSearchDoc(txtSearchKeywords.Text);
// GridViewDocuments_Search.DataSource = query;
GridViewDocuments_Search.EditIndex = e.NewEditIndex;
GridViewDocuments_Search.DataBind();
}
protected void btnSearch_Click(object sender, EventArgs e)
{
_DataContext = new EDMSDataContext();
var query = _DataContext.spQuickSearchDoc(txtSearchKeywords.Text);
GridViewDocuments.Visible = false;
GridViewDocuments_Search.Visible = true;
GridViewDocuments_Search.DataSource = query;
GridViewDocuments_Search.DataBind();
}
Grid view marks up:
<asp:GridView ID="GridViewDocuments_Search" runat="server" AutoGenerateColumns=False
Visible="False" onrowcommand="GridViewDocuments_Search_RowCommand" OnRowDeleting="GridViewDocuments_Search_RowDeleting"
DataKeyNames="DocID" PageSize="100"
onrowcancelingedit="GridViewDocuments_Search_RowCancelingEdit"
onrowediting="GridViewDocuments_Search_RowEditing"
onrowupdating="GridViewDocuments_Search_RowUpdating" >
<Columns>
<asp:TemplateField HeaderText = "Details">
<ItemTemplate>
<asp:Button ID ="btn_Show" Text="Details" runat= "server" CommandName= "Details" CommandArgument='<%#
Container.DataItemIndex%>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="DocNo">
<EditItemTemplate>
<asp:TextBox ID="DocumentNo" runat="server" Text='<%# Eval("DocumentNo") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("DocumentNo") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Title" SortExpression="title">
<EditItemTemplate>
<asp:TextBox ID="title" runat="server" Text='<%# Eval("title") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Eval("title") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="DocID">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Eval("DocID") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Eval("DocID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Originator">
<EditItemTemplate>
<asp:TextBox ID="Originator" runat="server" Text='<%# Eval("Originator") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Eval("Originator") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Unit">
<EditItemTemplate>
<asp:TextBox ID="Unit" runat="server" Text='<%# Eval("Unit") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label5" runat="server" Text='<%# Eval("Unit") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowEditButton="True" />
<asp:CommandField ShowDeleteButton="True" />
</Columns>
</asp:GridView>
GridViewDocuments_Search_RowCommand
protected void GridViewDocuments_Search_RowCommand(object sender, GridViewCommandEventArgs e)
{
int rowindex = Convert.ToInt32(e.CommandArgument.ToString());
_DataContext = new EDMSDataContext();
int _Docid = (int)GridViewDocuments_Search.DataKeys[rowindex].Value;
switch (e.CommandName)
{
case "Details":
Response.Redirect("~/Documentfortest.aspx?DocID=" + _Docid);
break;
case "Delete":
_DataContext.DeleteDoc(_Docid);
_DataContext.SubmitChanges();
break;
}
var query = _DataContext.spQuickSearchDoc(txtSearchKeywords.Text);
GridViewDocuments_Search.DataSource = query;
GridViewDocuments_Search.DataBind();
//UpdatePanel1.Update();
}

Answer 1

I think you need to move your databind code in rowcommand under Case "Delete" before break;, you are rebinding your gridview in rowcommand for every command that is fired (edit/update).
For example:
protected void GridViewDocuments_Search_RowCommand
(object sender, GridViewCommandEventArgs e)
{
int rowindex = Convert.ToInt32(e.CommandArgument.ToString());
_DataContext = new EDMSDataContext();
int _Docid = (int)GridViewDocuments_Search.DataKeys[rowindex].Value;
switch (e.CommandName)
{
case "Details":
Response.Redirect("~/Documentfortest.aspx?DocID=" + _Docid);
break;
case "Delete":
_DataContext.DeleteDoc(_Docid);
_DataContext.SubmitChanges();
//rebind only if row is deleted
var query = _DataContext.spQuickSearchDoc(txtSearchKeywords.Text);
GridViewDocuments_Search.DataSource = query;
GridViewDocuments_Search.DataBind();
break;
}
}

Answer 2

The RowUpdating event fires before your data in updated in the grid. This allows you to make any changes to the data before it is updated.
The newly entered values are available to you in the collection NewValues.
This is how you could use it.
protected void GridViewDocuments_Search_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
_DataContext = new EDMSDataContext();
int _Docid = (int)GridViewDocuments_Search.DataKeys[e.RowIndex].Value;
_DataContext.updateDoc(_Docid,
e.NewValues["DocumentNo"].ToString(),
e.NewValues["title"].ToString(),
e.NewValues["unit"].ToString(),
e.NewValues["originator"].ToString());
_DataContext.SubmitChanges();
GridViewDocuments_Search.EditIndex = -1;
var query = _DataContext.spQuickSearchDoc(txtSearchKeywords.Text);
GridViewDocuments_Search.DataSource = query;
GridViewDocuments_Search.DataBind();
}
Note: There is also a RowUpdated event that fires after the row is updated.