How to clear value of all textbox on Asp.Net buttons click

Question

I have a button to display the records or information about customers ,the problem I just noticed that when I select a customer who has provided all the necessary information , the information about that particular customer is displayed properly , now when I try to display another customers information who has some missing fields , that time the missing field of this particular customer is replaced by the previous customers infomration , that means I need a way to clear the textboxes before I display customers information.Here is the method that I have to display the information.

public void ShowCustomerInformationCat1()
{
    if (customer.cCustomerType != null)
    {
        ModifyCustomerByCategoryddlCustomerType.SelectedIndex = ModifyCustomerByCategoryddlCustomerType.Items.IndexOf(ModifyCustomerByCategoryddlCustomerType.Items.FindByText(customer.cCustomerType.Trim()));
        ModifyCustomerByCategoryddlNewCustomerType.SelectedIndex = ModifyCustomerByCategoryddlNewCustomerType.Items.IndexOf(ModifyCustomerByCategoryddlNewCustomerType.Items.FindByText(customer.cCustomerType.Trim()));
    }
    if (customer.cInitial != null)
    {
        ModifyCustomerByCategoryddlInitial.SelectedIndex = ModifyCustomerByCategoryddlInitial.Items.IndexOf(ModifyCustomerByCategoryddlInitial.Items.FindByText(customer.cInitial.Trim()));
        ModifyCustomerByCategoryddlNewInitial.SelectedIndex = ModifyCustomerByCategoryddlNewInitial.Items.IndexOf(ModifyCustomerByCategoryddlNewInitial.Items.FindByText(customer.cInitial.Trim()));
    }
    if (customer.cGender != null)
    {
        ModifyCustomerByCategoryddlGender.SelectedIndex = ModifyCustomerByCategoryddlGender.Items.IndexOf(ModifyCustomerByCategoryddlGender.Items.FindByText(customer.cGender.Trim()));
        ModifyCustomerByCategoryddlNewGender.SelectedIndex = ModifyCustomerByCategoryddlNewGender.Items.IndexOf(ModifyCustomerByCategoryddlNewGender.Items.FindByText(customer.cGender.Trim()));
    }
    if (customer.cCountry != null)
    {
        ModifyCustomerByCategoryddlCountry.SelectedIndex = ModifyCustomerByCategoryddlCountry.Items.IndexOf(ModifyCustomerByCategoryddlCountry.Items.FindByText(customer.cCountry.Trim()));
        ModifyCustomerByCategoryddlNewCountry.SelectedIndex = ModifyCustomerByCategoryddlNewCountry.Items.IndexOf(ModifyCustomerByCategoryddlNewCountry.Items.FindByText(customer.cCountry.Trim()));
    }
}

Can anybody suggest me how to clear the textboxes , I dont want to clear them individually. Thanks for any suggestions.

score 11 · Accepted Answer · edited Mar 27 '20 at 17:34

11

foreach (var item in Page.Controls)
{
    if (item is TextBox)
    {
        ((TextBox)item).Text = "";
    }
}

edited Mar 27 '20 at 17:34

Miss Chanandler Bong

4,081
10
26
36

answered Jun 04 '12 at 11:59

levi

3,451
6
50
86

score 2 · Answer 2 · answered Jun 04 '12 at 12:03

2

try like this.

foreach (var obj in Page.Controls.OfType<TextBox>())
{
   obj.Text="";
}

answered Jun 04 '12 at 12:03

Ravi Gadag

15,735
5
57
83

score 2 · Answer 3 · answered Jun 04 '12 at 12:03

2

Try this:

Control myForm = Page.FindControl("Form1.aspx"); 
foreach (Control ctl in myForm.Controls) 
if (ctl.GetType().ToString().Equals("System.Web.UI.WebControls.TextBox")) 
((TextBox)ctl).Text = "";

answered Jun 04 '12 at 12:03

coder

13,002
31
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214

I am getting an error Object reference not set to an instance of an object.In place of Form1.aspx , I just replaced the name of my page. – Priyank Patel Jun 04 '12 at 12:08

score 2 · Answer 4 · edited Mar 27 '20 at 17:35

private void SetTxtChildren(Control ParentControl,string NewValue = "", Boolean Enable = true)
{
    foreach (Control c in ParentControl.Controls)
    {
        if (c is TextBox)
        {
            ((TextBox)c).Enabled = Enable;
            ((TextBox)c).Text = NewValue;
        }
        else if (c.Controls.Count > 0)
        {
            ClearTxtChildren(c, Enable);
        }
    }
}

Other answer is indeed correct, but this code will also set textboxes that are children of children. Basic recursion will run the same loop on any child control that has child controls of its own. This way you can set all textboxes within a particular control and it's sub-controls (like accordions or content blocks).

score 1 · Answer 5 · edited Mar 27 '20 at 17:36

1

little update for levi's solution, in my scenario I just wanted to clear specific texbox(s) which are in the grid control named grdDetails. using fw 4.0 with wpf

foreach (var item in grdDetails.Children)
{
    if (item is TextBox)
    {
        ((TextBox)item).Text = "";
    }
}

edited Mar 27 '20 at 17:36

Miss Chanandler Bong

4,081
10
26
36

answered Jan 12 '15 at 15:10

cmurat

31
7

score 0 · Answer 6 · edited Mar 27 '20 at 17:38

0

protected void Button1_Click(object sender, EventArgs e)
{
    ClearSection();
    //Rest of your code
}

private void  function ClearSection()
{
    foreach (Control cntrl in Page.Controls)
    {
        if (cntrl is TextBox)
        {
            ((TextBox)cntrl).Text = "";
        }
    }
}

edited Mar 27 '20 at 17:38

Miss Chanandler Bong

4,081
10
26
36

answered Jun 04 '12 at 12:04

Nikhil D

2,479
3
21
41

score 0 · Answer 7 · edited Mar 27 '20 at 17:37

0

private void  function ClearSection()
{
    foreach (Control cntrl in Page.Controls)
    {
        if (cntrl is TextBox)
        {
            ((TextBox)cntrl).Text = "";
        }
    }
}

edited Mar 27 '20 at 17:37

Miss Chanandler Bong

4,081
10
26
36

answered Mar 02 '13 at 08:38

Darshil

1

3

Code-only answers may solve the problem but they are much more useful if you explain how they solve it. – Nick Mar 28 '20 at 10:05

score 0 · Answer 8 · edited Mar 27 '20 at 17:40

Instead of using So many lines of codes. You can solve it by just in a single code by just setting the text box value to null property.

see here

protected void btnSubmit_Click(object sender, EventArgs e)
{
    DataTable dt;
    USignUp USignUp = new USignUp();
    DateTime DOB;

    try
    {
        if (chkAccept.Checked == true)
        {
            DOB = Convert.ToDateTime(txtDOB.Text);
            int UserTypeId = 1;
            USignUp.SignUp_Insert(txtEmail.Text, txtPwd.Text, txtUFName.Text, txtULName.Text, txtCInfo.Text,
            DOB, UserTypeId);
            txtEmail.Text = "";
            txtPwd.Text = "";

            txtUFName.Text = "";
            txtULName.Text = "";
            txtCInfo.Text = "";
            txtCnfrEmail.Text = "";
            txtDOB.Text = "";
            txtCnfrmPwd.Text = "";
        }
        else
        {
            lblMessage.Visible = true;
            lblMessage.Text = "Please accept the terms and conditions";
            //Response.Write("<script LANGUAGE='JavaScript' >alert('Please select Checkbox');document.location='" + ResolveClientUrl("~/SignUp.aspx") + "';</script>");
        }
    }
    catch
    {
    }
}//It works.You can Know more on this by clicking to http://transinntech.com/

score 0 · Answer 9 · edited Mar 27 '20 at 17:36

0

protected void Button1_Click(object sender, EventArgs e)
{
    refresh(this);
}

public void refresh(Control cont)
{
    foreach (Control x in cont.Controls)
    {
        if ((x.GetType() == typeof(TextBox)))
        {
            ((TextBox)(x)).Text = "";
        }

        if (x.HasControls())
        {
            CleartextBoxes(x);
        }
    }
}

edited Mar 27 '20 at 17:36

Miss Chanandler Bong

4,081
10
26
36

answered Jul 21 '15 at 07:49

Litisqe Kumar

2,512
4
26
40

How to clear value of all textbox on Asp.Net buttons click

9 Answers9