//通过文本输入框 对比度调节 private void textBox_Contrast_TextChanged(object sender, EventArgs e) { if (this.ActiveControl != sender) { return; } if (textBox_Contrast.Text == "") { return; } int contrast = Convert.ToInt32(textBox_Contrast.Text); trackBar_Contrast.Value = contrast; MvApi.CameraSetContrast(m_hCamera, contrast); }