string json = File.ReadAllText("tsconfig1.json"); dynamic jsonObj = JsonConvert.DeserializeObject(json); dShutterValue = jsonObj["exposureTime"]; m_txt_Shutter.Text = dShutterValue.ToString("F2"); m_listCCamerInfo[m_nOperateID].m_objIGXFeatureControl.GetFloatFeature("ExposureTime").SetValue(dShutterValue); m_txt_Shutter.Clear(); try { if (!m_listCCamerInfo[m_nOperateID].m_bIsOpen) { return; } strValue = m_listCCamerInfo[m_nOperateID].m_objIGXFeatureControl.GetFloatFeature("ExposureTime").GetValue().ToString(); //浮点转字符串 try { dShutterValue = Convert.ToDouble(m_txt_Shutter.Text);//把文本框的值换成double，给dShutterValue } catch (Exception) { MessageBox.Show("请输入正确的曝光值"); m_txt_Shutter.Text = strValue; return; }c#窗体的文本框被json文件赋值后无法继续接收键盘输入的值，怎样利用m_txt_Shutter.Clear();语句，使文本框被赋值后可以继续接受键盘输入的值

To allow the text box to continue accepting keyboard input after being assigned a value from the JSON file, you can remove the `m_txt_Shutter.Clear()` statement. This statement clears the current text in the text, which is why it appears that the text box cannot receive keyboard input after being assigned a value.

Here is the updated code:

string json = File.ReadAllText("tsconfig1.json");
dynamic jsonObj = JsonConvert.DeserializeObject(json);
dShutterValue = jsonObj["exposureTime"];
m_txt_Shutter.Text = dShutterValue.ToString("F2");
m_listCCamerInfo[m_nOperateID].m_objIGXFeatureControl.GetFloatFeature("ExposureTime").SetValue(dShutterValue);

try
{
    if (!m_listCCamerInfo[m_nOperateID].m_bIsOpen)
    {
        return;
    }

    strValue = m_listCCamerInfo[m_nOperateID].m_objIGXFeatureControl.GetFloatFeature("ExposureTime").GetValue().ToString();
    //浮点转字符串

    try
    {
        dShutterValue = Convert.ToDouble(m_txt_Shutter.Text); //把文本框的值换成double，给dShutterValue
    }
    catch (Exception)
    {
        MessageBox.Show("请输入正确的曝光值");
        m_txt_Shutter.Text = strValue;
        return;
    }
}
catch (Exception ex)
{
    // Handle any other exceptions here
    // Log the exception or display an error message
}

By removing the `m_txt_Shutter.Clear()` statement, the text box will retain the value assigned from the JSON file and will be able to receive keyboard input.