通过数据集foreach比较文本框文本C＃

Question

Im getting really stuck trying to iterate through a dataset to check if the company name entered into a textbox (TXTBXCustomerLookup) matches any of the entries in the dataset in column "CompanyName" when the button is pressed

So far I have this:

private void BTNLookupCustomer_Click(object sender, EventArgs e)
    {

        if ((TXTBXCustomerLookup.Text != "") && (TXTBXCustomerLookup.Text != " "))
        {
            foreach (DataTable table in ds.Tables)
            {
                foreach (DataRow row in table.Rows)
                {
                    foreach (object item in row.ItemArray)
                    {
                        if (TXTBXCustomerLookup.Text = this.CompanyName.ToString())
                        {
                            BTNUpdateCustomer.Enabled = true;
                            BTNDeleteCustomer.Enabled = true;
                        }
                    }
                }
            }
        }
    }

and it is coming up with the error "Cannot implicitly convert type 'String' to 'Bool" and "Cannot convert method group 'ToString' to non-delegate type 'string'. Did you intend to invoke the method"

These errors are on the line below

if (TXTBXCustomerLookup.Text = this.CompanyName.ToString())

I know it must be something simple I'm doing wrong but cannot think what and have spend over an hour trying to figure it out (using old trusty google)

Answer 1

if (TXTBXCustomerLookup.Text == this.CompanyName.ToString())

Answer 2

You need two = signs. Otherwise your trying to assign the compannyname value to your TXTBXCustormerLookup textbox.

if (TXTBXCustomerLookup.Text == this.CompanyName.ToString()){
    BTNUpdateCustomer.Enabled = true;
    BTNDeleteCustomer.Enabled = true;
}