Cant Access Textbox from code behind

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Hi,
I Cant find the textbox id in the code behind.I have tried following things:
1.Commented and added new text box with different id.
2.Deleted the Edit Item template and added the new template.
3.Copied the entire Grid and pasted in a new web form[Here all the textbox are not available in the back ground]
4. Build,Rebuild,Clean the solution.
The code works properly.

ASP.NET

<asp:GridView ID="grdDailyReport" runat="server" AutoGenerateColumns="False" DataKeyNames="Id"
            BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px"
            ShowFooter="True" CellPadding="3" CellSpacing="2" OnRowCommand="grdDailyReport_RowCommand">
            <FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
            <RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
            <Columns>
                <asp:TemplateField>
                    <FooterTemplate>
                        <asp:LinkButton ID="lnkDelete" runat="server">Delete</asp:LinkButton>
                    </FooterTemplate>
                    <HeaderTemplate>
                        <asp:CheckBox ID="chkDeleteAll" runat="server" />
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:CheckBox ID="chkDelete" runat="server" />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Id" InsertVisible="False" SortExpression="Id">
                    <EditItemTemplate>
                        <asp:Label ID="lblID" runat="server" Text='<%# Eval("Id") %>'>
                        </asp:Label>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblID2" runat="server" Text='<%# Bind("Id") %>'>
                        </asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="WithdrawalAmount">
                    <EditItemTemplate>
                        <asp:TextBox ID="txtWithdrawalAmount" runat="server" Text='<%# Bind("WithdrawalAmount") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblWithdrawalAmount" runat="server" Text='<%# Eval("WithdrawalAmount") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Balance">
                    <EditItemTemplate>
                        <asp:TextBox ID="txtBalance" runat="server" Text='<%# Bind("Balance") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblBalance" runat="server" Text='<%# Bind("Balance") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="BankName">
                    <EditItemTemplate>
                        <asp:DropDownList ID="ddlBankName" runat="server" SelectedValue='<%# Bind("BankName") %>'>
                            <asp:ListItem>--Select--</asp:ListItem>
                            <asp:ListItem>ICICI</asp:ListItem>
                            <asp:ListItem>IDBI</asp:ListItem>
                            <asp:ListItem>SBI</asp:ListItem>
                            <asp:ListItem>Axis</asp:ListItem>
                        </asp:DropDownList>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblBankName" runat="server" Text='<%# Bind("BankName") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="WorkerLabour">
                    <EditItemTemplate>
                        <asp:TextBox ID="txtWorkerLabour" runat="server" Text='<%# Bind("WorkerLabour") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblWorkerLabour" runat="server" Text='<%# Bind("WorkerLabour") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="PurchaseMatrialAmount">
                    <EditItemTemplate>
                        <asp:TextBox ID="txtPurchaseMatrialAmount" runat="server" Text='<%# Bind("PurchaseMatrialAmount") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblPurchaseMatrialAmount" runat="server" Text='<%# Bind("PurchaseMatrialAmount") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="PurchaseAgainst">
                    <EditItemTemplate>
                        <asp:DropDownList ID="ddlPurchaseAgainst" runat="server" SelectedValue='<%# Bind("PurchaseAgainst") %>'>
                     <asp:ListItem>--Select--</asp:ListItem>
                    <asp:ListItem>Furniture</asp:ListItem>
                    <asp:ListItem>Flooring</asp:ListItem>
                    <asp:ListItem>AC</asp:ListItem>
                    <asp:ListItem>Maintenance</asp:ListItem> 
                    <asp:ListItem>Water</asp:ListItem>
                    </asp:DropDownList>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="lblPurchaseAgainst" runat="server" 
                        Text='<%# Bind("PurchaseAgainst") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Comments">
               <EditItemTemplate>
                   <asp:TextBox ID="txtComments" runat="server" Text='<%# Bind("Comments") %>'></asp:TextBox>
               </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="lblComments" runat="server" Text='<%# Bind("Comments") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField>
                <EditItemTemplate>
                    <asp:LinkButton ID="lnkUpdate" runat="server" CommandArgument='<%# Eval("Id") %>'  CommandName="UpdateRow">Update</asp:LinkButton>
                    <asp:LinkButton ID="lnkCancel" runat="server" CommandArgument='<%# Eval("Id") %>' CommandName="CancelRow">Cancel</asp:LinkButton>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:LinkButton ID="lnkEdit" runat="server" CommandArgument='<%# Eval("Id") %>'  CommandName="EditRow">Edit</asp:LinkButton>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
        <PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
        <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
        <HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
    </asp:GridView>

Want the control in the button click

C#

protected void btnsubmit_Click(object sender, EventArgs e)
{
    int WithdrawalAmount = Convert.ToInt16(txtWithdrawalAmount.Text.Trim());
    int Balance = Convert.ToInt16(txtBalance.Text.Trim());
    string BankName = ddlBankName.SelectedValue;
    string WorkerLabour = txtWorkerLabour.Text.Trim();
    int PurchaseMatrialAmount =Convert.ToInt16(txtlPurchaseMatrialAmount.Text.Trim());
    string PurchaseAgainst = ddlPurchaseAgainst.SelectedValue;
    //string Comments = txtComments.Text.Trim();
        
 //DataAccessLayer.SaveDailyReport(WithdrawalAmount,Balance,BankName,WorkerLabour,PurchaseMatrialAmount,PurchaseAgainst,Comments);
    BindData();
}

Posted 3-Nov-13 20:00pm

Member 9176543

Updated 3-Nov-13 21:41pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v3

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vamforvamsi · Answer 1 · 2013-11-03T21:33:00

Solution 1

Hi
You cannot find the control which is present inside a grid view in a normal way. the below code you need to write to find the text box control under a data source control.
when u define a control at page level then u can achive this in the code behind normally but in case of grid view you need to write the following code.

TextBox txtQtyval1 = (TextBox)gvExcParts.Rows[i].Cells[1].FindControl("txtRMAPartQuantity");

Finding a control inside a gridview row[^]

Hope this helps
Vamsi krisna

Posted 3-Nov-13 21:33pm

vamforvamsi

Comments

Member 9176543 4-Nov-13 4:00am

Hi,
What is Rows[i],i cant write i it says its not found.I tried
string Comments = Convert.ToString((TextBox)grdDailyReport.Rows[0].Cells[8].FindControl("txtComments"));
but the value in the comment variable is blank.
And how other fields are allowed except this Comment 1.

vamforvamsi 4-Nov-13 6:42am

its basically an indexer in the for loop.
for(int i=0;i

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 2 · 2013-11-03T21:39:00

Solution 2

You can't do like this as there are TextBoxes for each Row.

For instance txtWithdrawalAmount will be present in all rows of the GridView.
So, if you access like below...

C#

int WithdrawalAmount = Convert.ToInt16(txtWithdrawalAmount.Text.Trim());

It will not work.

Rather you should run a Loop foreach Row of GridView and inside the Loop get the TextBox values.

Posted 3-Nov-13 21:39pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Member 9176543 4-Nov-13 5:43am

Hi Tadit Dash,
The other controls works fine like if i hard code the txtComments field then all other controls works properly i.e i can perform CRUD operations
Here is my DataAccessLayer
public static int SaveDailyReport(int WithdrawalAmount, int Balance, string BankName, string WorkerLabour, int PurchaseMatrialAmount, string PurchaseAgainst, string Comments)
{
DataSet ds = new DataSet();
string CS = ConfigurationManager.ConnectionStrings["connectivity"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
SqlCommand command = new SqlCommand("usp_sel_DailyReport", con);
command.CommandType = CommandType.StoredProcedure;
SqlParameter ParamWithdrawalAmount = new SqlParameter("@WithdrawalAmount", WithdrawalAmount);
command.Parameters.Add(ParamWithdrawalAmount);
SqlParameter ParamBalance = new SqlParameter("@Balance", Balance);
command.Parameters.Add(ParamBalance);
SqlParameter ParamBankName = new SqlParameter("@BankName", BankName);
command.Parameters.Add(ParamBankName);
SqlParameter ParamWorkerLabour = new SqlParameter("@WorkerLabour", WorkerLabour);
command.Parameters.Add(ParamWorkerLabour);
SqlParameter ParamPurchaseMatrialAmount = new SqlParameter("@PurchaseMatrialAmount", PurchaseMatrialAmount);
command.Parameters.Add(ParamPurchaseMatrialAmount);
SqlParameter ParamPurchaseAgainst = new SqlParameter("@PurchaseAgainst", PurchaseAgainst);
command.Parameters.Add(ParamPurchaseAgainst);
SqlParameter ParamComments = new SqlParameter("@Comments", Comments);
command.Parameters.Add(ParamComments);
con.Open();
return command.ExecuteNonQuery();

}
}

Member 9176543 4-Nov-13 6:31am

Hi Tadit Dash,
I tried to loop it but it doesnt works. It throughs an exception
protected void btnsubmit_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in grdDailyReport.Rows)
{
int WithdrawalAmount = Convert.ToInt16(((TextBox)row.FindControl("txtWithdrawalAmount")).Text);
int Balance = Convert.ToInt16(((TextBox)row.FindControl("txtBalance")).Text);
string BankName = ((DropDownList)row.FindControl("ddlBankName")).SelectedItem.Value;
string WorkerLabour = ((TextBox)row.FindControl("txtWorkerLabour")).Text;
int PurchaseMatrialAmount = Convert.ToInt16(((TextBox)row.FindControl("txtlPurchaseMatrialAmount")).Text);
string PurchaseAgainst = ((DropDownList)row.FindControl("ddlPurchaseAgainst")).SelectedItem.Value;
string Comments = ((TextBox)row.FindControl("txtComments")).Text;
DataAccessLayer.SaveDailyReport(WithdrawalAmount, Balance, BankName, WorkerLabour, PurchaseMatrialAmount, PurchaseAgainst, Comments);

}
BindData();

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 4-Nov-13 9:56am

What is the Exception?

Member 9176543 5-Nov-13 9:59am

Object reference not set to an instance of an object.
on the First Line.
I have verified all the id names.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 5-Nov-13 14:34pm

Okay let's try this. I am commenting all the codes and we will first try for the first TextBox. Try the below code.

foreach (GridViewRow row in grdDailyReport.Rows)
{
int WithdrawalAmount = 0;

TextBox textBoxWithdrawalAmount = (TextBox)row.FindControl("txtWithdrawalAmount");

int.TryParse(textBoxWithdrawalAmount.Text, out WithdrawalAmount);

// int Balance = Convert.ToInt16(((TextBox)row.FindControl("txtBalance")).Text);
// string BankName = ((DropDownList)row.FindControl("ddlBankName")).SelectedItem.Value;
// string WorkerLabour = ((TextBox)row.FindControl("txtWorkerLabour")).Text;
// int PurchaseMatrialAmount = Convert.ToInt16(((TextBox)row.FindControl("txtlPurchaseMatrialAmount")).Text);
// string PurchaseAgainst = ((DropDownList)row.FindControl("ddlPurchaseAgainst")).SelectedItem.Value;
// string Comments = ((TextBox)row.FindControl("txtComments")).Text;
// DataAccessLayer.SaveDailyReport(WithdrawalAmount, Balance, BankName, WorkerLabour, PurchaseMatrialAmount, PurchaseAgainst, Comments);
}

Now, debug and check if the value of WithdrawalAmount is coming correct or not for the first row after executing int.TryParse() line.

Member 9176543 6-Nov-13 9:32am

Same Error on line int.TryParse(textBoxWithdrawalAmount.Text, out WithdrawalAmount);
Object reference not set to an instance of an object.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 6-Nov-13 10:05am

Are you getting value for textBoxWithdrawalAmount.Text? Please check while debugging.

Member 9176543 6-Nov-13 10:22am

Null is passed and why out keyword is used.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 6-Nov-13 12:25pm

Int.TryParse methods syntax is like that. It outputs the parameter.

So, the TextBox Text value is null, right?

Member 9176543 6-Nov-13 23:40pm

How do I solve it.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 7-Nov-13 1:56am

Try to access the TextBox by its row and column index instead of FindControl.