TextBox

How to Get value from a text box when click on a button with button id " btnChng"


protected void  btnChng_Click(object sender, EventArgs e) //Button Click Event
        {
            string content=txtName.Text; //save textbox value to string  variable content        

}


string    : Type of data
content : Variable
txtName.Text: text value in the textbox( textbox id is "txtName")
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Enable/Disable TextBox


  protected void  btnEnable_Click(object sender, EventArgs e)
        {
            txtName.Enabled = true; // Enabled property set as true
        }

  protected void btnDisable_Click(object sender, EventArgs e)
        {
            txtName.Enabled = false;// Enabled property set as false
        }
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 TextBox Clear

protected void btnClear_Click(object sender, EventArgs e)
        {
            if (txtName.Text== "") //Check textbox is empty or not
            {
                Response.Write("<script>alert('There is no text entered...')</script>"); //Message
            }
            else
            {
                txtName.Text= "";//Clear textbox

            }
        } 
********************************************************************************************************** 
Check Type of data entered in Textbox 

protected void btnTest_Click(object sender, EventArgs e)
        {
            Int32 result;
            if (txtType.Text!= "") // Check textbox is empty or not
            {
                if (!int.TryParse(txtType.Text, out result)) // if any data in textbox ,Check it is int 

type or not ...if it is not an integear then show below message
                {
                    txtType.Text = "";
                    Response.Write("<script>alert('this field only contain numbers... ')</script>");

                }
            }

        }

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Small Letter to Caps Convertion

There is two textbox
1.txtSmall
2.txtCaps
protected void btnConvert_Click(object sender, EventArgs e)
        {
            string small = txtSmall.Text;//save first box value
            txtCaps.Text= small.ToUpper();//convert value use function("ToUpper()") and save in txtCaps
        }

***********************************************************************************

Set Focus

protected void btnFL_Click(object sender, EventArgs e)
        {
            txtLeft.Focus();//focus() function used to focus a control
        }

        protected void btnFR_Click(object sender, EventArgs e)
        {
            txttxtRight.Focus();
        }