Input string was not in a correct format

Posted Date: 22 Jul 2012 Posted By:: ptina Member Level: Bronze Member Rank: 1584 Points: 5 Responses: 3

private void btn_Clear_Click(object sender, EventArgs e)
{
txt_ID.Text = "";
txt_Manufacturer.Text = "";
txt_CatNo.Text = "";
txt_DischargeRate1.Text = "";
txt_BatteryCapacity.Text = "";
txt_Voltage.Text = "";
txt_Weight.Text = "";
txt_Length.Text = "";
txt_Width.Text = "";
txt_Height.Text = "";
txt_Series.Text = "";
txt_Parallel.Text = "";
//txt_TotalBatteries.Text = "";
}

private void btn_Exit_Click(object sender, EventArgs e)
{
this.Close();
}

private void txt_SystemVoltage_TextChanged(object sender, EventArgs e)
{
int intBatterySeries;
double dblBatterySeries;

if (txt_SystemVoltage.Text != "" && txt_Voltage.Text != "")
{
dblBatterySeries = Convert.ToDouble(txt_SystemVoltage.Text) / Convert.ToDouble(txt_Voltage.Text);
intBatterySeries = Convert.ToInt32(dblBatterySeries);
txt_Series.Text = intBatterySeries.ToString();
}

}

private void txt_Voltage_TextChanged(object sender, EventArgs e)
{
int intBatterySeries;
double dblBatterySeries;

if (txt_SystemVoltage.Text != "" && txt_Voltage.Text != "")
{
dblBatterySeries = Convert.ToDouble(txt_SystemVoltage.Text) / Convert.ToDouble(txt_Voltage.Text);
intBatterySeries = Convert.ToInt32(dblBatterySeries);
txt_Series.Text = intBatterySeries.ToString();
}

}

private void txt_Amp_TextChanged(object sender, EventArgs e)
{
int intBatteryParallel;
double dblBatteryParallel;

if (txt_SystemVoltage.Text != "" && txt_Voltage.Text != "")
{
dblBatteryParallel = Convert.ToDouble(txt_Amp.Text) / Convert.ToDouble(txt_BatteryCapacity.Text);
intBatteryParallel = Convert.ToInt32(dblBatteryParallel);
txt_Parallel.Text = intBatteryParallel.ToString();
}
}

private void txt_BatteryCapacity_TextChanged(object sender, EventArgs e)
{
int intBatteryParallel;
double dblBatteryParallel;//<<<error msg

if (txt_SystemVoltage.Text != "" && txt_Voltage.Text != "")
{
dblBatteryParallel = Convert.ToDouble(txt_Amp.Text) / Convert.ToDouble(txt_BatteryCapacity.Text);//<<<<<<<<<<<<<<<<<<<<<<< error
intBatteryParallel = Convert.ToInt32(dblBatteryParallel);
txt_Parallel.Text = intBatteryParallel.ToString();
}
}

private void textBox2_TextChanged_1(object sender, EventArgs e)
{

}

private void txt_TotalBatteries_TextChanged(object sender, EventArgs e)
{
int intBatteryParallel;
double dblTotalBattery;

if (txt_Series.Text != "0" && txt_Parallel.Text != "0")
{
dblTotalBattery = Convert.ToDouble(txt_Series.Text) * Convert.ToDouble(txt_Parallel.Text);
intBatteryParallel = Convert.ToInt32(dblTotalBattery);
txt_TotalBatteries.Text = intBatteryParallel.ToString();
}
}
}
}

when i click the clear button. error msg as formatexception was unhandled. input string was not ina correct format.
at this part of the code as shown above.
private void txt_BatteryCapacity_TextChanged(object sender, EventArgs e)
{
int intBatteryParallel;
double dblBatteryParallel;//<<<error msg

if (txt_SystemVoltage.Text != "" && txt_Voltage.Text != "")
{
dblBatteryParallel = Convert.ToDouble(txt_Amp.Text) / Convert.ToDouble(txt_BatteryCapacity.Text);//<<<<<<<<<<<<<<<<<<<<<<< error
intBatteryParallel = Convert.ToInt32(dblBatteryParallel);
txt_Parallel.Text = intBatteryParallel.ToString();
}
}

1)how to correct the error as i am unable to clear the textboxes? 2)any mistake at txt_TotalBatteries as i am unable to get ans by multiplying txt_series and txt_parallel?

Responses

#681345 Author: ptina Member Level: Bronze Member Rank: 1584 Date: 22/Jul/2012 Rating: Points: 1
sometimes i get values for txt_parallel as 0.2,0.5 but the ans is displayed as 0. how to display as 1 even the value is 0.2 or 0.5?

#681346 Author: Ravindran Member Level: Diamond Member Rank: 3 Date: 22/Jul/2012 Rating: Points: 2
Hi, Before converting to Double make sure txt_BatteryCapacity text is integer value if you pass string value then the Input string error occur Regards N.Ravindran Your Hard work never fails

#681353 Author: Dharmaraj Nagarajan Member Level: Gold Member Rank: 13 Date: 22/Jul/2012 Rating: Points: 3
Hi, These error is because of either the value is not matching the format to the data type you wish to convert as Ravi suggested. One more thing before proceeding with the conversion, you need to check for the null value. `string Num; num=""; if(num != "") { //put your conversion process here. }` All is well. Thanks, Dharma Editor,Mentor,MVM Try and fail but don't fail and try Me and DNS

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